KUMON NEW Triangle Tangram Educational Toy Puzzle

This educational toy lets you fit triangular pieces together like a puzzle. I think you can play with it like a puzzle.

It hasn't been played with much and has been stored in a dark place.

Since all the pieces are the same isosceles triangle shape, even young children can easily get familiar with shapes. The guide board starts with fitting one piece and gradually challenges you with shapes that have more pieces. Through trial and error, you'll be able to solve difficult puzzles as you play, and you'll naturally develop a sense of shapes and thinking skills.