POOF-SLINKY-Scientific Explorer Kit: Motor Boat Madness. Become a 'Junior Electrician' by building a real working electric motor! Install the motor into the included boad and watch it cruise in water! Make your own electric bell, buzzer and telegraph too! Package contains everything you need to make a boat motor and electric bell and buzzer! Requires 1 D Battery (not included). Recommended for ages 8 and up. WARNING: CHOKING HAZARD: Small Parts. Not for children under 3 years. WARNING: This product contains a small magnet. Swallowed magnets can stick together across intestines and cause serious infections and death. Seek immediate medical attention if a magnet is swallowed. Imported.