balloon-powered boat

Don’t throw out that empty milk carton! Use it to make a toy boat that can move throught the water with your own homemade turbo engine. Air seeping out of a balloon can power a boat through water. Make this boat and watch it zoom. To make a balloon-powered boat you need: a balloon an empty milk carton a paperclip scissors Directions: Cut off one side of the milk carton to make your boat. Poke a hole at the stern of the boat, fairly close to the waterline. Put the balloon in the carton and push the nipple through the … Continue reading balloon-powered boat

capture wind power

To make a windmill you need: a 15 cm by 15 cm square piece of thin cardboard scissors a large fat plastic straw two straightened paperclips a nail Directions: Fold your thin piece of cardboard diagonally and then diagonally again. Cut down each fold towards the center, stopping about 2 cm from the center. Poke a hole in the center of the cardboard with the nail. Poke holes in the top right corner of each cut triangle as you turn the square in your hand. Each triangle should have just one hole. If you make a mistake, don’t worry. The … Continue reading capture wind power

create a sundial

Often people look up in the sky to guess what time it is by the position of the sun. Your sundial will be accurate on the day you make it. For the next few months it will be fairly correct. After that – don’t count on it at all or you’ll certainly be late! To make a sundial you need: an aluminum pie plate or a cut out circle of cardboard a plastic straw masking tape a marker a clock or watch a sunny day Directions: Stand the straw straight up in the center of the pie late or cardboard … Continue reading create a sundial