A little boy comes home with his mother from a trip down town. Above his head he has a big bunch of balloons.
- Why do you need so many? - Asks his father. - Did not your mother and I teach you that you should save your money?
- I did not spend any! Its just that every time Mummy bought something the salesperson gave me a free balloon.
Snails produce a colorless, sticky discharge that forms a protective carpet under them as they travel along. The discharge is so effective that they can crawl along the edge of a razor without cutting themselves.