When the marbles get "dizzy enough" they drop down the hole into the next level down on the speed snake track. Contents include: 1 big speed circle (plastic) 1 speed snake track (plastic) 1 wooden ramp 6 rectangular wooden blocks 1 wooden cube and 6 glass marbles. Manufacturered by HABA. Wooden blocks and ramp are made from solid beech wood that comes from sustainable forestry in Germany. Yellow funnel and winding track are made of ABS plastic. A perfect addition to your existing HABA marble ball track set. Compatible with all HABA marble ball track sets and accessories as well as all HABA building block sets. Recommended for beginner to advanced builders ages 3 to 10. In the Big Speed Circle the marbles whiz around in the circle first slowly then faster and faster.