Supertato: Happy Birthday, Nitwit Volume 13

Happy Birthday, Nitwit! There's a party and you're invited in this latest adventure in the blockbuster series!

'Hap-pea birthday to you,
Mashed potato and poo.
Hap-pea birthday, dear NITWIT,
Hap-pea birthday to you!'

It's night-time in the supermarket and the veggies are busy baking for a SUPER special someone's birthday. But can you guess who's going to try to ruin the surprise?!