1. Turn the cups upside down.
2. Write a number on the bottom of each cup from 1-10.
3. Stack the cups on a flat surface. Set cups 1-4 in a straight line leaving a little space between each cup.
4. Stack cups 5-7 on top of the first row of cups.
5. Stack cups 8-9 to form the third row.
6. Stack cup 10 on the very top.
7. Finish off your Christmas tree with a bow or star topper.
8. Let your little one topple the tree and start again!
9. To make it more of a puzzle for older kids, mix up the numbers so they have to sort them before stacking.