Anyone heading down to Cornwall this summer can get entry into both Crealy Great Adventure Park in Exeter and Crealy Great Adventure Park in Wadebridge for just £12.95 per person total. see here for more details
They have a new offer where you can stop off at the Devon park on your way down then get free entry for 6 days into the Cornwall park.
The traffic can get bad trying to get down to Cornwall and this way you can stop off have some fun, then when you get back on the road the traffic should have calmed down. Plus the children should then be really tired (and hopefully sleep not whinge!) 