The GraviTrax Special Starter Twist is a comprehensive 101-piece set designed to provide everything needed to build individual and exciting marble runs. This set encourages unlimited fun with endless building possibilities, combining creativity and STEM learning. Special action elements like the trampoline and spiral add spectacular interactive features, allowing marbles to bounce and spin unpredictably for enhanced play. Compatible with the full GraviTrax range, it supports flexible expansion and long-term play value for children aged 8 and above.