BaseTen Math do that with coins and give the kids the ability to do math on that.
My kids love to play the game and learn how to add playfully.
This game has the following features:
- Visualize representaion of big number with base ten coins
- Teach kids the meaning of position of digits ( tens, ones) with coins
- Start with just pennies then progress to mixes with dimes
- Animate the process of merging, converting the ones to tens and counting to get the answer