What kind of robots can you dream up? Kids build their own twisting, turning STEM creations with the mix-and-match pieces of the 1-2-3 Build It. Robot Factory from Learning Resources. Sized just right for little hands, this build-it-yourself toy's chunky plastic pieces are ready to help kids design, build, and tinker with their own robo squad during open-ended play sessions. Build tall bots with squiggly green legs, add a few eyes to help your creation see, or snap on a propeller that really spins. 1-2-3 Build It. Robot Factory also comes with an Activity Guide featuring recommended builds, which helps kids learn essential STEM skills ranging from critical thinking and early engineering to following directions. The pieces in the 1-2-3 Build It. Robot Factory set work with all 1-2-3 Build It. building sets, so kids can make their creations even crazier.