Building Brick Stem Challenging Kit

Give kids a fun new way to build STEM skills! From constructing a bridge for a car to cross to creating a marble maze, children design and troubleshoot their creations, problem-solving their way through each exciting challenge! Kit includes 253 building pieces, 4 marbles and 10 double-sided challenge cards. Longest building piece measures 5 7/8" x 10 5/8". Ages 4+