Potty training books

[MarioandLuigi]

Am trying to find some books for DS2 (4) to help with out potty training.

Does anyone know any good ones - he likes books with rhyme or repetition.

Mr Spotty's Potty is a fun rhyming book about a dog and a potty!

Not potty training per se but dd used to love 'Who's In The Loo'. Good rhymes.