i need a english joke!!

I haven't seen my cousin for ages!
You won't regonise him. He grown another foot!

(Foot=a length, 12 inches)

One day,Peter went to a book shop that was on sale.
Shopkeeper:Come and buy some book!Ten dollar for a book,when you buy the second book,you can have a free ball pen!
Peter:Then of I buy the third book,what can I got?
Shopkeeper:Hmm...three books!
Peter:...