We have a water table that my 4 and a half year old loves, but we also don’t have much storage so it sits outside year round and gets pretty grubby. On the first hot day of the year, I pulled it out to the driveway, gave my son a new sponge, some dish soap and a hose. After he was done with the table, he proceeded to give a bath to all of the toys that went along with it. He had a blast getting soaked & playing in the bubbles and it took one chore off my list!
Bonus Hack: If you’re having an outdoor party & don’t have enough coolers, fill a water table with some ice and water, then load it up with beverages. It keeps the drinks cold and it gets a laugh out of the parents. Note: this probably won’t work if there are little kids at the party – I know mine would be very unhappy to see us "borrow" his toy!