Discover engineering wonders through scientific exploration! Introduce and explore all 6 simple machines by making amazing discoveries, designing solutions for real-world problems, and conducting investigations. Includes a lever board wedge pulley, with rope and hook, cart with removable wheels. Archimedes screw, 4 barrel weights, 10 double-sided Activity Cards, and a comprehensive Activity Guide. Cart measures 5'L x 31/2'W. Small Parts (1). Not for children under 3 yrs.