Learning Resources Design & Drill Marble Maze. This fun STEM activity set is ideal for cause-and-effect learning through play. Mini makers choose a maze challenge card, create the maze design using the drill, bolts, and track pieces, drop in a marble and watch it go! Children can use the 10 predesigned maze challenges or create their own. Track pieces vary in length and design, and offer lots of fun, open-ended, creative STEM play opportunities. Set includes maze board, 15 track pieces, 20 bolts, 2 legs, power drill, 10 double-sided challenge cards,  2 wall brackets. Maze board measures 30cm H x 25cm W x 5cm L. Drill requires 3 AAA batteries not included. Ages 5+. Warning: SMALL PARTS Not for children under (three) 3 years.