Young children find it easiest to grasp new knowledge when it’s “tangible,” “visible,” and, as N. Zaitsev likes to say, “ear-audible.” If you make this simple learning tool, it’ll be much easier to explain number composition to your little one. Plus, this kind of math lesson strengthens the small muscles in your child’s hand.
So, take several sheets of sturdy cardboard, a set of clothespins, and a marker. On each cardboard card, write a number from 0 to 10.
First, demonstrate: zero is no clothespins at all. One is one clothespin, two is two clothespins, three is three clothespins, and so on.
Once they’ve got that down, you can move on to studying number composition.
3 = 1 clothespin + 1 clothespin + 1 clothespin
3 = 2 + 1
3 = 1 + 2

Three (3) can be shown this way. Or it can be represented as 1 and 2, as 2 and 1, or as 1, 1, and 1.
Understanding the Number 4
Looking at your photo, I can see a brilliant example! The number 4 card has clothespins attached showing different ways to compose the number 4.
How can we make the number 4?
- 4 = 2 + 2 (two red clothespins on one side, two blue on the other)
- 4 = 3 + 1 (three clothespins on one side, one on the other)
- 4 = 1 + 3 (one clothespin on one side, three on the other)
- 4 = 1 + 1 + 1 + 1 (four separate clothespins)
- 4 = 2 + 1 + 1 (and many other combinations!)
The beauty of using different colored clothespins (like the red and blue ones in your photo) is that children can visually distinguish between the different parts that make up the whole number. They’re not just learning abstract math—they’re physically building numbers with their hands, seeing the patterns, and feeling the weight of each composition.
This hands-on approach makes math concrete rather than abstract, which is exactly what preschoolers need. They can experiment, try different combinations, and discover mathematical relationships through play. And the pinching motion required to attach clothespins? That’s excellent fine motor practice that will help with everything from writing to buttoning clothes.
Try this activity with your child, and watch as those little fingers work and that mathematical mind grows!
