Here's a few ideas that I came up with:
Paint an ocean mural --use butcher paper and cut into waves, then paint blue.
Go to a party store to find a big sun--or create one!
You can find pails at the Dollar stores now for Easter......use them for everything from serving food to goodie bags. You could fill the goodie pails with shiny, glittery nail polish and lip gloss, dollar store sunglasses that you've embelleshed with Rhinestones or jewels. They could even tie-dye their own t-shirt bathing suit coverups.
Make a beach.....Dont forget the sea shells!
Spread out beach towels on the floor
Use a plastic pool and lawn chairs to complete the whole "look" ( If you are going to fill the pool with water or sand, use garbage bags under the beach towels for added protection.
Other games: beach blanket bingo and horse shoes or ring toss ( can frugally make your own ring toss game).
If you have room, get a couple of hula hoops and have a contest.
(I can never remember the name of this next game) You have a stick that you dance under and move it lower and lower. ????
Found this idea: Tropical fruit punch with tiny umbrellas in the cups.
I'll work on some food and easy decoration ideas.
Beach food sounds like hot dogs, chips and a drink to me but there might be cuter ideas out there too!
I wish that I was able to have cool parties like this now!! We didnt have these when I was growing up.
