These are new-concept educational blocks. They support the development of young children by stimulating the fingertips with suction cup play, which enhances the connection between the fingertips and the brain. By looking at examples and imitating them, they also help children develop their self-expression skills. They can even be played with on the bathroom wall. - Product Name: Pita-Rico - Target Age: 2 years old and up Although there are no noticeable stains, please refrain from purchasing if you are sensitive to used items, as they have been used by a child. They will be shipped in simple packaging.