Hi, nice powerpoint, I think I'll have to steal it for next week's free lesson!
Just a couple of points, we don't use telly for telephone, we use this for TV the same as the US. Also barbie is Australian slang not British, we'd think of the doll for that one as well. Finally, bollacks, (actually spelt bollocks) is quite a rude word. We certainly wouldn't use it around children so it's probably not one you should teach in school unless this is for a teacher's class.
Cheers for the lesson though,
Charlie