Here's a long list.. and some you may have heard already but I added it anyway.
Well my kids and I... we play Treasure Hunt.. just hide something and make some clues and hide them... you know. One clue leads to another clue until it leads to the end of the hunt where the treasure is
A blindfold game: Someone is "it" and is blindfolded and it's like tag from there on except everyone's quiet. (BTW: The it person can be spun after being blindfolded and before the start of the game and this game should be played where there aren't many sharp cornered stuff but places you can hide...)
Sparkle: Spelling game with a ball. Choose a word, then pass the ball around, each person saying the next letter of the word. At the end, say Sparkle. lol. (I had to play this in elementary days)
There's always puppet shows.. that can go in alot of different ways such as a shadow light show thing where you use tissue paper and construction paper (etc) to make stick puppets and shine the light and it'll be colored on the wall.. you know what I mean? Or regular puppets.. hand puppets..
Collages (sp?).. they can cut and paste stuff...
Painting.. Musical Chairs.. Dodgeball..
For a water game.. why not just hot potato?! or something like that with a big water balloon.
Or an similar I Spy game. You choose an item.. relatively small. Place it somewhere around the room and the kids go look for it. Once they see it, they act like they're still looking so that it's not obvious and then they can sit down.
Or a freeze/take a picture type game: Just say the theme is like.. Angry and they freeze and pose an angry pose. lol
This is a recipe activity thing: Apple, peanut butter, and M&M's (or other various candy). Scrape the core out of the apple.. So that there's like room in there and stuff it with peanut butter and some candy.
Theater stuff... make plays.. masks.. Replay a scene from a famous story or something...