Comes with 60 pattern challenge cards. Combine the 14 puzzle pieces to match one of the 60 puzzle cards. Made of plastic. Fun for both kids and adults. A great brain teaser for all ages. Learn with fun. Develops aptitude for problem-solving. Like building blocks, tangrams can teach kids about spatial relationships. Helps kids learn geometric terms and develop stronger problem-solving skills. Stimulates and develops spatial and cognitive skills, visualization of figures, and making it.