Demonstrate the principle of dish-shaped radio and television antennas using umbrellas to transmit and receive a beam of sound waves.
- Point the handles at one another, a few meters apart.
- Line the insides of two open umbrellas with kitchen foil to make them reflect sound.
Get a friend to hold a ticking watch near one umbrella while you listen near the other. The sound beam will be picked up and relayed so that the ticking is clearly heard.
A time capsule is a container of items chosen by people to show what life was like for them.
Make one to open yourself in the year 2025 or maybe on your 21st birthday.
Put items that reveal various aspects of your life into an airtight plastic box (a sample list is as the image shown).
- Either bury the capsule in the garden or store it somewhere safe.
- Alternatively, get your friends to make a capsule and exchange it with them. You could open this immediately
You will need:
- a ruler
- a pair of scissors
- a pencil
- a sheet of paper
- a small nut and bolt
- Measure and mark the paper to the following sizes: 20 cm long, 4 cm wide.
- Cut it out.
- Draw a line down the center of the rectangular strip.
- Make a mark 13 cm along the line and cut it up to this point.
- Bend the two flaps.
- Make a small hole in the uncut end
- Insert the bolt.
- Screw on the nut.
Throw the paper as high as possible into the air and watch it descend, with its flaps rotating, like a helicopter.
We experience the things around us by means of sight, hearing, touch, taste and smell.
But is there a ‘sixth sense’? Do we possess extrasensory perception (ESP)?
Test your powers of ESP using mental telepathy.
- Take 25 plain postcards and mark them with a star, cross, square, circle, or wavy lines to get 5 sets of 5 identical card.
- Get a friend to shuffle the cards and deal 10 of them face up on a table, one at a time.
- While he thinks about each card dealt, you sit out of sight of the cards and write down what you think each one is.
- By simply guessing, you should, on average, get two correct in every 10 predictions.
- If you consistently score more than this, it could be evidence that ESP exists in the form of telepathy.
- Now test for clairvoyance by trying to predict the cards before they are dealt.