Stayed in an outstanding villa (half-board) on Brac last summer - took the nipper and his mate (both age 10). There was a pool at the villa, and it was about 30 metres from the sea. Hired a car at Split airport (flew from Soton = WIN), which was essential for getting around the island during the day. Snorkeling was brilliant, the food at the villa was totally amazing, the kids were fascinated by being able to clamber all over the ancient ruined churches, which were everywhere. Day out in Split was great . Not a single complaint, no bickering. In the evenings we drank wine while the kids played in the pool, watched Hadjuk Split on the telly with the villa owners, got invited to a village ox roast. I can't remember a holiday with kids that I've enjoyed more. I have the contact details for the villa owner if you want - he's happy to book direct without going through the agent.