This Aftershock! Earthquake Lab is perfect for sleepovers, play dates, or family fun nights. It's designed for budding engineers and geophysicists aged 8 and above. The 53 - piece kit has a motorized dual - action shake machine with variable speed, 32 building girders, 9 floor panels, 8 wall panels, 1 base panel, 6 interchangeable quake keys, 3 interlocking power spines, a sticker sheet, and a 24 - page illustrated science activity book. You just need to add three 1.5V AA (LR6) batteries (not included) to start the earthquake - testing fun.