This experiment investigates your sense of touch. You will need some plasticine, two cocktail sticks, a blindfold and a friend.
1) Make a touch tester by sticking the cocktail sticks into the plasticine about 2 cm apart.
2) Blindfold your friend and then gently touch them on the back of the hand with the touch tester. Sometimes touch them with both sticks, sometimes only one. Ask your friend how many they can detect. Record the results.
3) Now use the touch tester on other parts of the body. Can some parts of the body feel better than others?
If you move the points further or closer apart do you get the same result? Try it and see.
