Trolls on Hols

It''s summer and all of Ulrik''s school friends seem to be going on something called ''holiday''. Mr and Mrs Troll investigate. Their neighbours, the Priddles have just bought a caravan, and after a muddled conversation, it seems the troll family have been invited to join them. But when they arrive at the campsite in Wales and the Priddles open the caravan to discover it full of trolls they don''t...