Today we are unboxing this fun Knex Infinity Roller Coaster! It is simple, put this fun track together and then pull it back with the slingshot launcher and watch it race and rush around the track, circles, upside down, slow motion fun! We love watching this little coaster race around this fun track. We love seeing all the different action filled adventure ridden roller coasters race. This is so fun and we love watching and learning together. We think it is super fun to see all the toys racing and playing on this super high track!