This is a ROKR Marble Parkour 3D wooden puzzle set, model LG501.The kit includes 254 precision laser-cut wooden pieces and 10 marbles to build a mechanical marble run.Assembly requires no glue, and the finished model features a big funnel rail and gear-driven mechanics.It is designed for ages 14 and up and takes approximately 13 hours to build Marble Parkour marble run in natural wood color. Engaging mechanical gears and winding tracks for hands-on STEM play. Promotes problem-solving, fine motor skills, and creative assembly. Includes detailed interlocking wooden pieces for durable construction.