How to Make A Water Rocket

This is an instructable on how to make a water rocket using only recyclable materials. All materials can be found in your house or classroom. This also involves a parachute, which is attached to a tennis ball, that will be deployed and in the air for at least 30 seconds. It's simple and quick, all you need is the right materials.

Materials:
2 2L Bottles
1 Thin Garbage Bag
1 Manila Folder
2 Sheets of Arts & Crafts Foam
1 Water Balloon
3 Rubber Bands
1 Tennis Ball
Fishing Line
Scissors
Exacto Knife
Duct Tape
Masking Tape
Stapler/Staples
Wire

Step 1: Cut the First Bottle

In this step you will have to use an Exacto knife to cut out the center of the first bottle. Look at picture to see where to cut. Make sure you keep the top and bottom leftover from cutting out the center.

Step 2: Attach the Bottles

Place the middle of the cut bottle on the bottom of the second bottle and attach using duct tape. Make sure the two pieces are securely attached.

Step 3: Adding the Fins

Take the manila folder. Along the folded side, cut three triangles so when they are opened, they appear as diamonds. Fold the edges of the fins so there is a flat piece that will be taped down to the bottle. Attach the fins to the bottle using duct tape.

Step 4: Creating the Top

Creating the top of your rocket is really simple. All you have to do is take the top of the first bottle you cut and attach it to a foam cylinder using duct tape. Then take a piece of foam and place it under the top of the bottle. Trace the outside of the circle on the foam. Cut out the circle with the Exacto knife. Use the outside as a skirt and place it around the cylinder, attach using a stapler.