Bournemouth - excellent beaches and always have plenty for kids to do plus they operate 'Kid Zone' to keep children safe on the beach and prevent them getting lost. Excellent bus & train services to many surrounding places Poole, Weymouth, Salisbury, Swanage, Christchurch, Southampton, Brockenhurst [go cycling in the New Forest], catch a ferry from nearby Lymington to the Isle of Wight. Have had many, many wonderful holidays there, can't rate it enough!