Karting is cool, the Bleekemolen boys are fine, but this tagline is ugly. “Bleekemolens Race Planet” is also Dunglish, as Bleekemolens with an ‘s’ is Dutch for “Bleekemolen’s”.
Off the top of my head here are some suggestions:
Fast entertainement for the whole family
Fast family entertainment
The fastest entertainment there is!
And I could go on!