You'll need a pool and really importantly eyes on the pool. The key thing here is to nominate one person as the official lifeguard.

A really fun thing to do is fill the pool with as many blow up toys that can. A cost efficient way of doing this is to use balloons instead.

For fun you can run some races, relays and a crazy diving competition.

Kids love water bombs and this is the perfect forum for an all an out water fight!

It's also easy to incorporate some Hawaiian elements into this theme. Think lei's, straw skirts, Hawaiian music and a coconut bar.