Is it normal for a 35-month-old to ask 'why' constantly?

Yes, constant 'why' questions are completely normal and developmentally healthy at 35 months. This behavior signals causal reasoning — your child understands that events have explanations and wants to learn them. Try answering patiently, and when you don't know, model curiosity by saying 'let's find out together.' The phase typically peaks between 2.5 and 4 years.

When should a toddler be able to hop on one foot?

Most children begin hopping on one foot between 33 and 36 months. Early attempts usually produce 1-3 hops before the child puts the other foot down. Sustained hopping (4-6 consecutive hops) typically develops between ages 3.5 and 4. If your child can't hop at all by 36 months, mention it at their 3-year checkup, but remember that this skill has a wide developmental range.

How do I know if my 35-month-old is ready for preschool?

Key preschool readiness signs at 35 months include: separating from parents without prolonged distress, following simple group rules, showing interest in playing with other children, communicating needs verbally, basic self-care skills (using the toilet, washing hands), and the ability to focus on an activity for 5-10 minutes. Academic skills like letter knowledge are less important than these social-emotional foundations.

What language skills should a 35-month-old have?

At 35 months, most toddlers have vocabularies of 600-900 words and speak in 4-5 word sentences. They use 'because' to explain reasoning, tell simple stories, and are understood by strangers most of the time. They use past tense, pronouns, and prepositions with increasing accuracy. If your child isn't combining words or is unintelligible to familiar adults, discuss this with your pediatrician.

How can I help my almost-3-year-old prepare for preschool?

Practice brief separations with trusted caregivers, arrange playdates where sharing and turn-taking are natural, read books about starting school, establish consistent routines (preschool follows schedules), and encourage independence in self-care tasks like dressing and hand-washing. Visiting the preschool before the first day also reduces anxiety for many children.

35-Month-Old Milestones: Hopping, "Why?" on Repeat, and Preschool Readiness

21 de septiembre de 2025|Poco Koko Team

"Why is the sky blue?" "Why do dogs bark?" "Why can't I eat ice cream for breakfast?" "But why?" At thirty-five months, your toddler has discovered the most powerful word in the English language and they have absolutely no intention of stopping. Some days you'll answer forty "why" questions before lunch. It's exhausting, delightful, and — according to developmental science — one of the most important cognitive tools your child will ever wield. Behind every "why" is a brain building causal reasoning, testing assumptions, and demanding that the world make sense. Meanwhile, that same relentlessly curious child is also learning to hop on one foot, showing the first genuine signs of preschool readiness, and developing a personality so distinct it surprises even you.

35-Month-Old Milestones at a Glance

Category	What to Expect
Gross Motor	Hops on one foot 1-3 times, walks on tiptoes, climbs and descends stairs alternating feet, throws ball overhand with aim
Fine Motor	Copies a cross (+) shape, uses scissors to snip paper, draws recognizable shapes, buttons and unbuttons clothing
Cognitive	Asks "why" questions persistently, understands concepts of time (morning/night), matches objects to pictures, begins simple problem-solving
Language	Speaks in 4-5 word complex sentences, uses "because," tells longer stories, vocabulary of 600-900 words, mostly intelligible to strangers
Social/Emotional	Shows preschool readiness behaviors, separates from parents more easily, follows group rules, engages in cooperative games with peers

Gross Motor Development at 35 Months

Hopping on one foot is the physical milestone that defines 35 months, and it's far more demanding than it appears. Unlike jumping — which uses both legs symmetrically — hopping requires single-leg strength, dynamic balance, and rapid postural adjustments. The American Academy of Pediatrics notes that most children begin hopping on one foot between 33 and 36 months, with early attempts producing one to three hops before they put the other foot down.

Tiptoe walking also becomes a deliberate skill rather than just an occasional quirk. Your 35-month-old may walk on tiptoes for fun or challenge, demonstrating calf strength and ankle control that have matured significantly over the past several months.

Stair navigation reaches a new level of independence. Many toddlers at this age alternate feet going both up and down stairs, though some still prefer the step-together pattern on the way down. Throwing accuracy improves — your child can now aim an overhand throw toward a target rather than just hurling in a general direction.

We've seen firsthand how much open floor space matters at this age. Toddlers practicing hops need room to wobble without hitting furniture edges — a clear play area makes the difference between confident practice and cautious hesitation.

35 month old toddler hopping on one foot on cushioned memory foam play rug in playroom

Cognitive & Language Development

The "why" phase deserves its own spotlight because it represents one of the most significant cognitive leaps of early childhood. When your toddler asks "why does it rain?" they're not just requesting information — they're demonstrating causal reasoning, the understanding that events have explanations and that those explanations are worth pursuing. Researchers at Harvard's Center on the Developing Child describe this questioning behavior as a form of "scientific thinking" that lays groundwork for academic learning years later.

Language now includes the word "because" — a game-changer for expressing logic. "I'm sad because my tower fell" connects emotion to cause, showing abstract reasoning in real-time. Sentences stretch to four or five words and become more complex, with conjunctions and prepositions appearing regularly.

Time concepts begin forming. Your 35-month-old may understand "morning" versus "nighttime," "today" versus "tomorrow" (loosely), and "before" versus "after." These temporal markers help them structure narratives and plan ahead, even in simple ways like knowing that pajamas come after bath.

Vocabulary expands to 600-900 words, and strangers can now understand your child most of the time — a significant shift from just six months ago when you often served as translator.

Social & Emotional Development

Preschool readiness signs emerge clearly at 35 months, and they're not about knowing the alphabet. The real indicators are social-emotional: can your child separate from you without prolonged distress? Can they follow simple group rules? Do they show interest in playing with other children rather than just alongside them?

Many 35-month-olds demonstrate all three. Separation anxiety, which may have been intense even a few months ago, often eases as children develop object permanence for relationships — the deep understanding that parents come back. According to the American Academy of Pediatrics, practicing brief separations with trusted caregivers builds the emotional resilience needed for preschool transitions.

Cooperative games with peers — taking turns, sharing materials, following shared rules — become more frequent and sustained. Your child's social world is expanding beyond the family unit, and they're developing the skills to navigate it.

Two toddlers playing together on memory foam play rug showing preschool social skills

Best Activities for 35-Month-Old Toddlers

Hopping games — Place colored paper circles on the floor and challenge your toddler to hop from one to another on one foot. Start close together and gradually increase the distance as balance improves.
"Why" conversations — Instead of deflecting, lean into the questions. When you don't know the answer, say "I'm not sure — let's figure it out together." This models curiosity and research behavior.
Simple board games — Games with spinners, color matching, or counting (like Candy Land or Hi Ho Cherry-O) teach turn-taking, rule-following, and graceful losing — core preschool skills.
Tiptoe obstacle courses — Create a path across a play rug where certain sections must be crossed on tiptoes, others by hopping, and others by crawling. Multi-movement courses build body awareness and listening skills.
Separation practice — Arrange short playdates or time with grandparents where you leave for gradually increasing periods. Casual, confident goodbyes set the emotional tone better than lingering farewells.
Storytelling prompts — Give your child three random objects (a spoon, a toy car, a sock) and ask them to tell a story using all three. This stretches imagination, vocabulary, and narrative structure simultaneously.

Creating a Safe Play Space for Your 35-Month-Old

With hopping, tiptoe walking, and increasingly ambitious climbing, your 35-month-old's play space needs to handle dynamic movement while remaining safe for the inevitable balance failures. This is also a good time to evaluate whether the space supports social play — preschool readiness includes learning to share a physical area with peers.

Priorities at this stage:
- Impact protection — Hopping practice means single-leg landings, which are inherently unstable. A cushioned play mat provides the fall protection that hard floors cannot
- Social play layout — Create space for two or three children to play together with shared materials
- Creative zone — With scissors, drawing, and storytelling skills all advancing, dedicate an area for art and imaginative play
- Clear boundaries — Defined play zones help your toddler practice the spatial awareness and rule-following they'll need in preschool

For a comprehensive setup guide, see the Ultimate Baby Play Mat Guide.

When to Talk to Your Pediatrician

Development varies widely, but the CDC advises parents to consult a pediatrician if their 35-month-old:

Cannot jump in place with both feet
Doesn't use sentences of 3 or more words
Avoids eye contact consistently
Shows no interest in other children or group activities
Cannot follow two-step instructions
Experiences regression in previously mastered skills

The 3-year well-child visit is just one month away — it's a natural opportunity to bring up any questions or observations you've been collecting.

FAQ

Looking Ahead

Next month is the big one — the 36-month mark, the 3-year checkup, and a developmental milestone that marks the transition from toddlerhood to early childhood. Everything your child has been building leads to this moment.

Written by the Poco Koko Team — parents, product designers, and child safety researchers dedicated to creating safer floors for families.