Perfect for rainy (and sunny) days, Royal Kart is in a covered area.
Children can also have a go from the age of 7.
From €14 for a 10 minute session.
Visit their web site for more information.
Cap Malo is on the St Malo - Rennes road (N137), exist Cap Malo / La Meziere.
See my post about Cap Malo shopping centre.
The ones not keen to try karting can shop! Smaller children can visit Woupi.