The sheltered bay of Ventnor offers a great family destination with good rocks for crabbing. The mainly sandy beach is a real sun trap and has a Mediterranean feel to it. The town centre is nearby with a range of shops, cafes and restaurants.
Self-catering cottage holidays in the UK and Ireland can still be a green option. You can have the comforts of home and the flexibility to do what you want; when you want - without the hassles of air travel!