If you're around my age (27ish) and anything like me, you probably used to run home from school and wouldn't go out until you'd watched this.
In my opinion this is one of the best childrens TV series, I used to run home from school when this was on, just so I wouldn't miss any!
But if you haven't seen this before, it's quite random:- hats that make you imitate whatever you see, ghosts that haunt the toilet etc, etc.
This is a highly amusing program, which still tickles me over 10 years later.