• The GraviTrax track can be infinitely extended with various add-ons for endless building and racing enjoyment
• Create the element of surprise; Use the Tunnels to hide the marbles as they travel through your track
• Includes 4x Curved Tunnels, 2x Straight Tunnels, 2x 'Y' Junction Tunnels, 2x Card Bases, 1x Vertical U-Turn, 2x Drop Rails, 2x Bent Rails
• The GraviTrax STEM track system makes experiencing gravity fun
• Suitable for 8 plus years