My sons have the Speedstars Thrill Loop, Vortex, and Raceway. They are very durable and easy for my 2 year and a 4 year old to use. As one of the reveiwers noted, the car comes out of the loop very fast so you do have to watch where you aim it. However, the Thrill Loop track will attach to the Vortex and then you don't have to worry about that anymore. Another thing I love about the Speedstars is that they are largely self storing. The flexible approach track slides into the loop which makes a much smaller unit to store. The winder attaches to the side of the loop and the car has a little garage in the base of the unit. Speedstars also stay together, unlike Hot Wheels tracks, and don't require frequent parent intervention. Speedstars are great!!!!