'Only three sleeps to go and then it's my birthday!
'There's a hippopotamus on our roof eating cake.
'It's his birthday, too. We are going to have our party together.
'A jungle party.
'And all our friends can come in animal costumes.
'The hippo is back to celebrate his 30th birthday with a brand-new book! Join him and his friends for a jungle-inspired celebration full of games and lots of jungle-party treats!' (From the publisher's website.)