Double Sided Spiral Twist
Get twice the spinning out of your Quadrilla set with this amazing double-sided spiral twist. Both the concave and convex sides feature spiraling tracks, doubling the play potential. Both sides of the twist can be used, doubling the play potential. Marbles travel inwards on the concave side and outwards on the convex side. Helps to develop spatial thinking and an understanding of Science, Technology, Engineering and Mathematics (STEM) principles. Suitable for children over 4 years.