Marble Genius Sky High Circles Accessory Add-On Set - Take Your Marble Run to the Next Level & Create a Gravity-Defying Track Race Thrills with 6 Pieces of Towering, Twisty-Turny Fun, Perfect for Kids

Marble Genius Sky High Circles - Marble Run Accessory Add-On Set (6 Pieces)

6 Round 'n Round pieces including 2 Round 'n Round's increase the fun and overall playability of your existing marble run toy. 4 Round 'n Round Topper pieces allow you to increase the stability and complexity of the marble runs you build. Standard toy size marbles (5/8 inch or smaller) work with this set (no marbles included with this set). Compatible with Marbulous Marble Run Toys including our Marble Genius Marble Run Starter Set (60 pc.), Super Set (85 pc.), Extreme Set (125 pc.), & 8 Accessory Sets.