Because they stick with magnets, "Sparks of insight grow!" and "Math (geometry) problems are solved with ease!" Useful for studying geometry! Elementary School Pythagoras for 3rd and 4th graders This item has been stored at home and used by a child, so there are minor scratches and signs of use. Please refrain from purchasing if you are looking for a perfect item or are concerned about the condition. Returns and cancellations are not accepted. Brand: People Please note that the outer box and instruction manual are not included. Price reduction not possible.