You can make bubbles in big rubbermaid tubs and it's more fun and less messy! Get a shallow rectangular tub and fill it with water and then pour in about a bottle of Joy liquid soap. Then fill it with all kinds of fun things like hangers, six pack rings, slotted spoons, etc. Anything with a hole makes a bubble! I also cut off the bottoms of soda bottles and yogurt containers or cut holes in the sour cream lids, etc. I usually put it out for all our parties and it's a big hit!
I also agree with the others to do some sort of water activity every day or most days with kiddie pools, sprinklers, etc. A friend of mine has a giant ball that hooks up to a hose and water sprays out of little holes all over it, it's pretty fun!