Quadrilla Double-Sided Spiral Twist Marble Track. 9 pcs.

Spin the Quadrilla set twice with this awesome double-sided spiral twister. Both the concave and convex sides have spiral tracks that double the fun. Playing tips When the hollow side of the spiralizer points upwards, marbles roll from the arm into the outer ring and then quickly down to the center. With the convex side up, the rolling speed of the marbles is reversed. A marble placed in the center will roll quickly from the center to the outer ring and arm. Features • Double-sided spiral twister • Both sides of the twister can be used, doubling the fun • Marbles roll inwards on the concave side and outwards on the convex side • Set consists of one double-sided spiral twister, three wooden dividing blocks, one hole valve, one accelerator, two stabilization rings and two height adjusters, eight marbles • German-developed design inspired by the Da Vinci circles • Helps develop spatial thinking and the basics of science, technology, engineering and mathematics) (STEM (Science, Technology, Engineering, Mathematics)) • Praised by The Wall Street Journal as the perfect toy for teaching kids how to code • Use with all Hape Quadrilla sets • For ages 4-99