Then again, “things got slippery” can be used metaphorically; and that meaning did appear in the story (mischievous Sparkles).
It’s really not great though. On the last page the hedgehog becomes huge.
And it makes no sense. Why was there too much butter? Why was some random girl in the house. How does butter make bread disappear? Why is one character a hedgehog and the other a human girl?
Author of "A Wrinkle in Time" Madeleine L'Engle said, "You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children."
Stories with animals that act as humans are a trend spanning from antiquity (Aesop) or earlier (myths) that just never went away (e.g. Guardians of Galaxy).