Shaving Cream Cars - This is an easy table time activity. Squirt a quarter size of shaving cream onto the table in front of each child. Give them one or two cars to cruise around in the shaving cream with. You can use a table cloth, dinner mats, or just right on top of your table.
Monster truck obstacle course...these tires were a hit at the party. We used them as pits for the beanbag toss and the kids sat and played in them all afternoon. They were a little big for 4 year olds to run through/over without tripping. Got them on amazon.com