1. Streamers from trees

It's important you give people an idea of what they're in for.
2. Pillow fights

Pillow fights don't belong in the bedroom, where no one can fawn over the victor!
3. Fancy furnishings

How else are you gonna class up the joint?
4. Polaroid cameras (or disposables)

Crowdsource your guests! By the end of the night, you'll have awesome shots from so many perspectives.
5. A tug o' war tournament

Only one team will win and reap the rewards you have chosen beforehand!
6. A tattoo station

They're like party favors you can take in the shower!
7. A dunking booth

It's so much easier than renting a pool.
8. Cotton candy

For the ultimate carnival experience!
9. An area for a water balloon fight

It's like tag, but with rubber!
10. Croquet

If no one knows the rules, just pose with the sticks.
11. Tire swings

A great way to bond is by sitting on something that used to be attached to an automobile.
12. A "make your own sundae" station

This is one line no one will mind waiting in.
13. Waterguns

A little competition never hurt anyone!
14. A piñata

So festive!
15. A kissing booth

For when you enter the "touchy feely" portion of the evening.
16. A caricaturist

Art students need to make money so they can buy those really expensive and special pencils, you know!
17. Something that glows in the dark

Just because the sun has somewhere else to be doesn't mean your guests do!
18. Sparklers

Use responsibly.
19. Lanterns

These are typically used to make wishes, and so by the end of your awesome party, it's only fair you give your guests a chance to wish you could quit your job and just throw garden parties.