Take the kids to Laem Hin Pier for some sunshine and fresh air. They'll have fun trying to find fish swimming in the waters below or boats way off in the distance.
When you've finished exploring this Ko Kaeo waterside attraction, why not make your way to Central Festival Phuket Shopping Center, Phuket Weekend Market, and Ratsada Pier? They're not very far from Laem Hin Pier and also a favorite with many tourists.