GraviTrax is the all new STEM track system from Ravensburger! Use your imagination to build superb tracks and set the gravity spheres rolling! Includes 1x Set of Instructions, 1x Set of Blueprint, 1x Exercise booklet, 4x Card Bases, 2x Transparent levels, 6x Gravity Spheres, 3x Long Rails, 6x Medium Rails, 9x Short Rails, 1x Magnetic Cannon, 21x Curved Bases, 3x X intersection Bases, 1x Vortex Base, 2x Y Points Bases, 1x End target, 1x 3in1 Base, 4x Bases for inserts, 1x 3 Way Starter Base Insert, 2x Catcher Base Inserts, 2x Switches, 1x Base Insert, 1x Free Fall Base Insert, 1x Target Base Insert, 40x Large Vertical Tiles, 12x Small Vertical Tiles. This set is suitable for 1+ players Suitable for ages 8 years and up. The GraviTrax track system can be extended indefinitely with extra track packs and add-on’s – each sold separately.