Rubber bands are so much more than just stationery essentials, and this project kit from Thames & Kosmos is here to blow your mind away by unraveling their potential. Learn the physics behind how rubber bands store energy that can be released and used as a powerful propeller for the catamaran, helicopter, airplane, car and fan boat you will build with this kit. Invite your friends over to double the fun of learning and playing. Details: Includes 16-page full color workbook For ages 8 and up