Stack High, Line Up Long
Stack blocks high and line them up long. As the number of blocks changes, help your child notice more, less, full, and empty.
- 15 months
- Quick prep
- At home
- About 15 minutes
Developmental benefits
- Cognitive：Comparing block towers and rows gives your child visible experiences of how using more or fewer blocks changes height and length.
- Movement：Placing one block carefully on another gives your child practice coordinating what they see with small, controlled hand movements.
Preparation
What You’ll Need
- 1
Blocks
- 2
a box for the blocks
Step 1
Build Together
Take several blocks from the box and build upward with your child. Let them place each block while you pass the next one. Say, “It’s taller,” as the tower grows, then knock it down and invite another build.
What to notice
- Uses both hands together to stack several blocks
Fine Motor - Claps happily after knocking down the blocks
Emotional Functioning
Tips
- As you hand over a block, say, “Here is one more.” Repeatedly hearing “one” with a single object helps connect the word with the amount.
- Knocking down a tower gives your child an exciting, repeatable result: one action makes the blocks fall.
Step 2
Build a Different Tower
After your child builds a tower, make another using a different number of blocks. Compare the two heights and quantities, then knock them down one at a time and listen to the sounds. Build two new towers and notice which one your child chooses first.
What to notice
- Shows that they want to knock down the taller block tower first
Emergent Mathematical Thinking - Repeatedly pushes down the block tower
Exploration and Discovery
Tips
- Point to each tower and compare both quantity and height: “This one has more blocks, so it is taller.”
Step 3
Make a Long Block Train
If your child is finished building upward, arrange the blocks one by one in a long line and let them pass each piece. When the box is empty, point out that there are no blocks left inside and that all the blocks are now in the line.
What to notice
- Notices that there are no blocks left in the box and points this out to you Emergent Mathematical Thinking
- Continues placing blocks along the block “train” Fine Motor
Tips
- Invite your child to add blocks to the long “train” too.
- When the box is empty and your child looks toward you, spread your hands and say, “No more blocks.”
- Your child does not need to count the exact number yet. Seeing more and less, or some and none, provides an early experience of changing quantities.
Better Parenting Content Team · Updated September 11, 2026