Features:Complete 2 in 1 Accessories KitPerfect set of 83PCS which can make vary simple and complex tack models. Making it fit for kids of different ages. Besides it can compatible with other brand blocks.Steady Assemble and Smooth Slide / Race TrackThe blocks is smooth-hand feeling and can stay together smoothly.Safe, Educational and Durable GiftThis Slide / Marble Run Building Blocks Made from High Quality ABS Material, Non Toxic. Perfect gifts for Both Boys and Girls Ages 3 and Up.