The best recommendation I could give anyone with kids is to purchase a colorful play parachute. I purchased mine at costco several years ago and use it at almost every party I throw for my kids. There are so many fun games to play with a parachute.
1. Put a bunch of balls on the parachute and play popcorn, see how high you can get the balls to fly.
2. Put one ball on the parachute and see how long you can keep it from bouncing off, hot potato.
3. Have a child sit in the middle while everyone else shakes their handle, the person in the middle will be filled with laughter as the parachute wiggles all around them.
4. Have everyone quickly put their arms in the air and then move towards each other quickly, and then sit down so the parachute is under their bottom.
The games are endless with a parachute and create a lot of fun activities for the whole family.