Even a small party at Big Air is a BIG deal! Now you can celebrate with just your very BEST friends for the very BEST price. Big Air Trampoline Park is excited to celebrate with you--Happy Birthday!!! 5 Jumpers. Additional guests are $20.00 each. You get ONE hour jumping in our Trampoline Park followed by a 40 minute reservation in one of our areas/rooms. Two slices of pizza & soft drinks during reserved party time. Commemorative gift for the birthday guest.