This is the rare STEM kit that actually demonstrates the principle it teaches: 203 parts assemble into a functional hydraulic glove, and once you fill the syringes with water you can grip objects of varying sizes by squeezing the controllers. Configurable for left-handed, right-handed, or claw modes; the 40-page manual walks through hydraulic and pneumatic mechanics as you build. Ages 7 and up. 2021 STEAM Toy of the Year.