Have you ever heard of Tangram? It’s a geometric puzzle that made it all the way to Europe from China back in the 1800s. Used in classrooms everywhere as an educational tool, it’s a well-known fact that tangram is great for kids’ developing brains--and since there’s more than one correct answer, this game really stimulates their imaginations. To solve a puzzle, simply play with all seven pieces until they fit perfectly into the graphic. Drag a piece with your finger and the button will start to rotate to the right. Then move the piece until it fits. This app offers lots of different problems, ranging from easy to difficult, so everyone from kids to adults is thoroughly entertained.