You will need:
- 1 piece of paper
- A felt tip pen and sticky Tape
1. Cut the paper lengthwise, making a 5cm wide strip of paper.
2. Give the paper a half twist (180 degrees) and join the ends together with sticky tape.
3. Draw a line along the centre of the strip... keep going all the way around the paper.
4. Where did you end up?
4. Try cutting along the line you made... what happens?