Found a copy of one of my favorite childhood books. "Harvey's Hideout". Written and illustrated by Russell and Lilian Hoban, who also gave us "Emmet Otter's Jug Band Christmas."
It's a tale of sibling rivalry between Mildred andHarvey Muskrat. If any of you are a big sister with a little brother,(or vice Versa) this book is for you. Fits me and my big sister to a T.
If you're an only child, I can't help you there.