Wooden 100-piece tangram puzzle, for ages 3-5. - Brand: KUNO - Product Name: Step Tangram - Target Age: 3-5 years old - Features: Wooden puzzle Thank you for viewing. By trial and error, combining the pieces that divide a square into 9 parts, you can develop a sense of shapes. There are no particular stains, etc., but This is a used item, so it's for those who don't mind used items.