What does it take to amaze a kid? How about using ordinary objects to do what seems impossible? Check out the challenges presented here to learn their secrets.
The secret: Exploit the laws of physics. Wedge the bowl of a spoon between the tines of a similar-size fork as shown. Place one end of a toothpick through the middle of the tines. Now, set the toothpick on the rim of a sturdy glass and slowly adjust its location until the whole setup is balanced. You've just found the structure's center of gravity, or balancing point. The heavy handles of the spoon and fork shift the balancing point to its surprising location.
The secret: Enlist the power of air pressure. Place a deflated balloon in the cup, then blow the balloon up until it's pressing against the sides. The difference in air pressure provides enough grip to hold the cup when you lift it.
Cover the Penny with a Mason Jar Filled With Water
The secret: Hide it with bent light. Fill a jar with water, put the lid on it, then place the jar on top of the penny. The water causes a phenomenon known as refraction. The image of the penny traveling to our eyes is refracted, or bent, by both the water and the jar, making it invisible from the outside.
The secret: Use uncooked rice to create friction. With a funnel, fill the bottle with rice, tap it on the table a few times to pack the grains, and add rice until it's almost to the rim. To lift the bottle, quickly jam a pencil straight down into the rice. When it's done right (and you may have to try a few times), the pencil forces the grains against the sides of the bottle, providing enough resistance to hold the pencil in place when you lift it.
The secret: Create a naturally sturdy structure by rolling the paper into a tube or cylinder. This geometric shape has remarkable supporting power (think of a sunflower stem or tin-can stilts).
The secret: Turn the bill into a drill. Fold the bill so it has a sharp point, roll it tightly so that point remains sharp, and choose a lemon with a thin skin, if possible. Insert the point into the lemon, then twist and push to work the bill into the fruit. With a bit of luck, it will come out the other side. If not, make some lemonade and try again with another lemon!
