Family Site on Coast - Gems but not Dev / Corn?

Hi there

Advice really welcome about any gems around the UK for a young family. We have done Devon / Cornwall quite a bit so looking for somewhere new but struggling to decide on a location

We arent into the 'clubhouse' thing and looking for a smaller site with things to do close by and hopefully the coast within walking distance?

Relatviely new to this game so also not wanting a hard to access site!!!

Bit specific i know but any advice / site names welcome

thanks