STEM Explorers Motioneering. Explore engineering and design with this construction set thats packed with engaging challenges. There are so many ways to experiment and learn. Children can follow the STEM challenge builds to create moving designs including a windmill, catapult, or pendulum, or create and build their own designs. Playing with STEM Explorers Motioneering encourages planning, logical thinking, and problem-solving skills through hands-on discovery and fun play. 56 Piece Set.