Techno Gears Marble Mania Zoomerang 2.0 STEM construction set features 80+ brightly coloured interlocking pieces, base plates, 3-D connectors, a corkscrew marble lifter, a funnel marble drop, and a step by step instruction manual to guide you to the finished product. Techno Gears products are all interchangeable which provides added play value and endless building possibilities! These marble run construction sets are perfect for boys and girls ages 6 years and up.