This kit is loaded with fun! Quickly set up cool domino chain reactions and runs with the Speed Template and Rapid Tracks. Create tricks & stunts with Spinners, Arcs, Staircase Bridge, and tracks, and amaze your eyes in a display of Brilliant colored dominoes. Kit includes: 200 Kinetic Dominoes (pro-scale), 12 Domino Arcs, 5 Rapid Tracks, 2 Staircase bridges (4pcs), 2 straight tracks (5"), 2 Spinners, 1 4-way splitter, 1 Speed Template. Build and Design with dominoes are great for STEM a STEAM.