Learning Journey The Techno Gears Marble Mania Accelerator Watch marbles fly through a roller coaster of fun with this play set Features a colorful, rollercoaster-themed track The automatic marble launcher will propel marbles through the giant marble loop and into a series of twisting and turning roller coaster tracks accompanied by fun roller coaster sounds This marble set offers hours of fun while simultaneously helping kids learn basic mechanics, large motor skills, and problem solving Made of over 400 durable plastic pieces More than 400 colorful pieces Features a marble launcher that propels marbles through the giant marble loop and onto the roller coaster tracks Compatible with all techno gears sets Fun roller coaster theme Expands knowledge of mechanics and engineering