Scientific Explorer Motor Boat Madness and Sonic Electronics Kit Designed to inspire young scientists to explore the world of electromagnetism 3-in-1 safe and fun educational make-it-yourself kit includes a step-by-step 20-page booklet with (16) different activities Build a real working battery powered electric motor, electric bell, buzzer and telegraph machine Scientific Explorer is the industry leader in fun, educational and activity-based science kits Recommended for children 8-years of age and older with adult supervision