I almost bought this for $85 last week for my son.
Experience the power of Gravity! Gravitrax is the all new STEM track system from Ravensburger! Use your imagination to build superb tracks and set the Gravity Spheres rolling! This STEM system [Science, Technology, Engineering and Maths] is an ideal one to teach kids about gravity, magnetism, kinetic energy and fun.
Looks like something I'd love to use. I'm 8+ too lol.