Cromer, about 45 mins north, is nice and they have a peir and good fish and chips, about the same south is Southwold, better peir, better fish and chips and the home of Adnams beer. the only thing in Gt Yarmouth is the Sea Life centre but unless you have a bogoff voucher is quite expensive ( vouchers are on Coco pops and rice crispies at the mo). Where are you staying?