Painting $1 models from the craft store. Note that the paint DOES wash off of surfaces easily, but still have the kids wear playclothes!
Who doesn't love a good game of dress up?
Have fun eating a messy lunch, in this case, spaghetti.
Find a local petting zoo and feed the animals, $0.25 a handful!
By far our best investment all summer long is our $15 wading pool.
Eat your meals "alfresco" (thanks Fancy Nancy!)
Tire them out at the park! Have fun finding new parks in the area that you normally don't frequent.
We had a blast just hanging out at Bass Pro Shop a few weeks back. We rode ATV's and boats, and the place was a Taxidermist's paradise!