This geometry game will make your child a master of the polygon! He'll compete against other players by measuring and drawing out shapes with playing cards determining the length of each line. Careful though, the measurements of lines will need to connect in order to close a polygon. If the card drawn doesn't give the number he needs to finish his shape, start the line out or draw the line in another direction and wait to turn the next card. Whoever completes the most polygons wins!