Step 1

With awl, drill a hole of the diameter of the straw in the center of the PET bottle cap.

Cut a 10cm section from a straw on the side of the folding part.

Push the straw through the outer hole of the cap, leaving the folding part about 2 cm above the cap.

Plug the hole on both sides with blu tack.

Step 2

Inside view.

Step 3

Screw the cap back onto the bottle.

The launch base is completed.

Step 4

With a pair of scissors, cut two 6 cm sections from a straw.

Step 5

Split the two straw sections lengthwise.

Step 6

Slide a split section onto a pencil.

Step 7

Slide a second split section on the other side of the pencil, making sure that it slightly overlaps the two edges of the first section.

Step 8

Tape the two sections lengthwise together to form a sealed tube.

Step 9

Remove the tube from the pencil (fuselage of the rocket) and cover one of its openings with blu tack to seal it well.

Step 10

Build different models of rockets, for example, by adding fins formed from aluminum foil, scotch or bristol cardboard.