The Secret in the Compost Bin

What do you do when you desperately want a pet of your own but your parents put their foot down, insisting pets cost too much to feed and they're messy?
Jeremy solves his dilemma by getting a secret pet, hatched from a very odd, large egg. His pet isn't messy and doesn't cost anything to feed. His is also a most unusually nice and helpful pet. Jeremy's very happy to have his new companion, although he's still not ready to tell his parents about it...