Small experiments, BIG ideas! The bubble machine is a great way for young engineers to learn about the principal of mechanical rotation through the fun of BUBBLES! Supplies included: bubble ring, base plate, motor clamp, vertical support, motor, battery box, fan blade, bubble catch, 2 double-sided foam tapes, rocker crank, optical shaft, rocker tube, 4 sleeves, 2 bubble packets and easy instructions Requires 2 AA batteries, not included. Recommended for children 8 years of age and older with adult supervision. Through simple electrical circuit science, you can create your own bubble machine!