This is a fantastic Techno Gears Marble Mania Dual Velocity Raceway STEM set from 2012. It offers hours of fun for children aged 8 and up, and it's perfect for anyone who loves building and experimenting with marbles. The set includes everything needed to build an incredible marble run, complete with exciting twists, turns, and high-speed jumps.

This set is made by The Learning Journey, a leading brand in educational toys and games. It's a complete set, which means it includes all the pieces needed to build the marble run. The set is themed around STEM (science, technology, engineering, and math), so it's perfect for kids who are interested in these subjects. The set comes with detailed instructions, making it easy for kids to build and play with. This is a great gift for any child who loves building and experimenting, and it's sure to provide hours of entertainment.