Purchased 2 coasters for my son's 5th birthday. Description was "racecar red" and product pictured looked to be bright red. Coasters I received were more maroon. We have an exceptionally large driveway which I've always considered essentially flat. Coasters worked great going down the driveway but to get back up which is less than a 5 degree incline was a bust. Fortunately the children figured out that it might be fun to push each other back "up" but again I stress "up" is essentially flat. I guess these coasters would be ideal on a gymnasium floor or maybe a perfectly flat school parking lot.