Brackitz Pulleys Building Toy Set, 77 Pieces

Build complex structures while learning essential STEM principles. This 77-piece set can be used to build 8 different contraptions that haul, lift, slide and move up/down. Helps develop fine motor skills, problem solving and creativity. Construct cranes, zip lines and other contraptions. Over 25 standards-aligned lessons are available online. Recommended for children ages 4 and up.