I have to brag a little bit. I was determined not to spend an insane amount of money for a 3 year old's birthday party.
Here's what we did:
Homemade "beach cake"
fresh fruit
cupcakes
juice boxes
water
For the adults:
iced tea
non-alcoholic pina coladas
Party Bags:
a plastic lei
pair of "party favor" sunglasses, i.e. very, very cheap
ice cream cone-shaped bubble blower
For fun and games:
ds's own pool
slip-n-slide
a friend brought an inflatable water slide - I had planned to just have an extra sprinkler going, which would have been fine, I'm sure
sand art craft with baby food jars
It was a huge success, ds had a wonderful time and so did the other kids. We had 8 kids total along with parents.