The catapult

The materials are very simple, popsicle sticks, plastic spoons, rubber bands, hot melt snaps, and scrap paper. First, stack two popsicle sticks and glue them together to become the base of the catapult. Then prepare four popsicle sticks glued two by two, become two groups of popsicle sticks placed vertically, and then prepare five popsicle sticks aligned and glued, placed directly on the base, and then fixed with rubber bands at each end. In the spoon will be tied to even chopsticks respectively, with rubber bands to provide for the head, the formation of the launch can be modeled.

Balloon hovercraft

Find a CD disc, a film canister, the film canister to remove the lid, the open end of the application of a little glue in the center hole of the CD, and let the edges of the film canister to heat up the glue, to achieve the effect of a complete seal. Wait for the glue to cool down, use a peg in the top center of the film canister holes, so that the gas can come through, and then prepare a balloon, set on the film canister, and then use the air hole in the inflatable, and then seal the inflatable mouth, the air cushion boat is done.