Knock knock jokes

[Tommy]

Does anyone know any? I need a few very simple ones for DS1. I can't think of any and he only knows 2. he thinks it's really funny to keep repeating them (to the same people - hasn't quite got the hang of it yet )They need to be really simple and un-subtle though as he's not 3 yet! TIA

Isabel
Isabel necessary on a bicycle

martini
martini hands are frozen

can't think of any others at the mo - what are the ones he knows already?

Jo
Jo King

and

Boo
Boo Who?
No need to cry - it's only a joke

I have no idea if he understands the conecpt at all - but it is very funny
Thanks for those!

Try these for size...hope they help

Oooh great - thanks MN

orange
orange you gonna open the door and let me in?

Is this any good?