Design and Drill Marble MazeMini makers use a kid friendly power drill and colorful bolts to attach 15 track pieces of varying length and shape to complete 10 different maze challenges. Drop the ball to test the track and make adjustments as needed. Once kids complete the challenges, it's time for free play maze making! Either way, they're building critical thinking skills, exploring principles of science and engineering, developing fine motor skills, and more! Set includes a 12