Brain Tetris Block, Early Education 40-PCS Colorful Wooden Tangram Jigsaw Puzzles Intelligence Puzzle for Preschool Children Kids (A) Made of high quality wood,Smooth surface.No lead,No plastic,Non-toxic,Water-based Lacquer Finish. A set of 40 pieces.Start with 0, and let colorful building blocks learn how to count. Play creative, put a variety of graphics.Give full play to your child's imagination and use different shapes to create different patterns. This set of blocks uses common geometric patterns and colors to let the children know a variety of color and geometry.Tetris Blocks play an important role for children to develop people's logical thinking ability and good finger bones. Recommended Age Range 3 Years and up.30-day full money back guarantee,90-day Warranty.