I have a big list in my big head of fun things for the kids to do when friends come over:
Go to the corner market for ice cream, whipped cream as sprinkles and then make sundaes ( with whipped cream squirted directly in the mouth as requests by C & T)
Have a lemonade stand
Bake
Build a fort
Play a board game
Have races up and down the sidewalk out front
Make books
Create tee shirts with fabric markers
Decorate the dog