Roller coasters are mesmerizing for kids of all ages, and the new Techno Trax Sea Trek offers kids an “under the sea” coaster experience! The Sea Trek edition replicates a real-life roller coaster, while your yellow submarine travels through the under water fun park full of drops, twists, and turns as it makes its journey! The The motorized chain returns your submarine to the top of the track where another exciting sea journey begins! Complete with over 150+ parts to build this impressive set, the detailed online instruction manual is very colorful and easy to use. A fantastic product that supports STEM! Ages 8-99 years.