Block Play for Babies, Toddlers and Preschoolers: An Age-by-Age Guide

How we write: we have not run hands-on product tests. These guides explain what to look for at each stage and why, so you can judge any toy yourself. We never publish invented prices, ratings, or reviews; check the retailer for current details.

Blocks are one of the simplest toys you can own, and one of the most useful. Early-childhood experts at NAEYC (the National Association for the Education of Young Children) point to research linking block building with math, science and reasoning skills across the first four years. Penn State Extension's Better Kid Care adds physical skills, imagination and getting along with other children. Here's how block play changes as children grow, and how to set it up at home.

Why blocks help

• Physical skills: lifting, carrying, stacking and moving blocks builds hand control and coordination.
• Early math: counting, matching, sorting, and noticing weight and length all happen naturally with blocks.
• Problem solving: working out how to keep a tower up or make a bridge means trying an idea, watching it fall and trying again.
• Feelings and focus: NAEYC notes blocks give practice with self-control, handling frustration and sticking with a challenge, plus real pride when something stands.

What to expect at each age

• Babies: blocks get mouthed, grabbed, tossed and banged. That's the point at this stage. NAEYC notes that around 9 to 12 months babies often bang a block in each hand together, and around 10 to 11 months they start putting objects into containers. Soft blocks that can be squeezed and safely mouthed suit this age. You do the stacking; they do the knocking down.
• Toddlers (about 1 to 2): toddlers carry blocks around, drop them and fill and dump containers. Starting around age 1 they begin stacking, and NAEYC says toddlers with plenty of block time often go from two to eight or more blocks in a tower by about two and a half. Bridges (two blocks with one across the top) tend to appear around 30 months, often copied from an adult first.
• Preschoolers (about 3 to 4): building gets a purpose. Better Kid Care describes a row of blocks becoming a road, a tall tower becoming a hospital, or a fence of blocks closing in toy animals as a zoo. Blocks become a big part of pretend play.

Setting it up at home

• Start small. NAEYC suggests infants may only need two or three blocks, and young toddlers about six to 10.
• Choose blocks that match the stage: soft fabric or foam blocks for babies; large, light blocks of wood, heavy cardboard or plastic for toddlers.
• Add a basket or bucket for filling and dumping, and let your toddler get the blocks out and help put them away.
• Give them floor space, so they can move around without tripping over their own buildings.
• For preschoolers, add toy people, animals and cars, and find a spot where a building can stay up to add to another day, out of reach of younger siblings.
• Talk while you play. Words like on top, under and next to help children learn spatial ideas. Rotating different block types now and then keeps play fresh.

You don't need an expensive set

Better Kid Care notes good wooden blocks can be expensive and describes making a sturdy set from clean cardboard milk cartons packed with newspaper and covered in self-stick paper. If you do buy a set, check the age grading, look for smooth edges and pieces too big to fit in a young child's mouth, and skip small interlocking pieces until the age on the box says they're okay.

Safety first: always follow the age grading on the package and supervise play. For children under 3, avoid small parts (see our safety checklist).