S5·E4 It's a secret

Tip just can’t keep a secret. It’s no good: secrets burst out of him, like sneezes! But, with Nutty’s help, Tip learns how to keep a secret in order to play a game or surprise somebody. He recognises the importance of keeping a secret when he sees how happy Mommy is about the surprise party organised for her: it can be hard to keep a secret, but sometimes, it really is worth it!