It's Posy's birthday and she's delighted with Pip's present of a beautiful toy bus. After having fun with the bus, then playing a string of party games, it's soon time for the birthday tea. But just as Pip is carrying his cake to the table, he trips over the bus and flies into the air - along with the cake!All small children will enjoy finding out what happens to the cake - and seeing how Pip and Posy make the best of a very sticky situation!