" Hello! We are the Netoons - Champions of hygiene. We are going to take your pupils on a discovery of hygiene practices in a variety of countries through the ages. They will become experts!
We live together and work as a team, each of us with a specific role."
" Hi! We're the Buurkis! We are horrible germs and dirt of every description. We will do anything to cause trouble for the Netoons and make their life difficult."