These take only 5-10 minutes to make, but provide a lot of fun. All you need is an index card, tissue, and tape. To launch you need a bike pump with a nozzle shaped like this >. This nozzle = and this one --- wont work.
Here is a video of it in action
Thanks to KelliShaver's Instructable for inspiration.
Step 1: Materials
Tape (masking, duct, etc)
1 index card
1 bicycle pump (Optional)