Do you know any simple jokes that my nearly 5 year old will love?

[enid]

My mind has gone blank...she is suddenly into jokes. The ones she loves are the simple 'knock-knock' ones eg 'Knock knock, whos there, boo, boo who? O dont cry its only a joke'

There must be loads! Help me impress her with my wit, o wise mumsnetters...

why was Tigger dirty?
because he was playing with poo

What did the bus driver say to the frog? Hop on!

Knock knock,
Who's there?
Banana.
Banana who?
Knock knock,
Who's there?
Banana.
Banana who?
Knock knock,
Who's there?
Banana.
Banana who?
Knock knock,
Who's there?
Orange.
Orange who?
Orange you glad I didn't say banana?

My dd (5) and ds (7) have laughed at most of these. Thanks