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'sInstructable for inspiration.
Step 1: Materials
Tape (masking, duct, etc)
1 index card
1 bicycle pump (Optional)
Step 2: Create the Body
Step 3: Tape
Step 4: Attach Fins
Then fold them (picture 2)
And cut (picture 3)
Then attach it to the barrel (picture 4)
Repeat for all 3 pieces of tape.
Step 5: Cover Top
Put a piece of tape over the top, so it looks like picture 2.
Step 6: Create Inner Weight
WARNING: HOT GLUE IS HOT! IT CAN BURN, SO BE CAREFUL.
Step 7: Attach Outer Weight
Step 8: Finishing the Rocket
Step 9: Launching
When using the straw, push it in the barrel until it is secure. Then blow hard until it pops. If you can't blow it out, then loosen the straw a little more.
When using the pump, then push the barrel onto the nozzle. Aim the nozzle (away from people) and then pump as hard as you can. I've gotten it to go 20ft with the pump.
Remember, always be safe (wear goggles and launch it away from people), and enjoy!
Post how far you've gotten it to go in the comments.