I like most books, particularly children's and YA. The fact that I am 21 does not and will never hinder this, and it shouldn't. A good book is a good book is a good book.
I'll read anything I can get my hands on if the mood suits me.
I would've loved this as a kid. The art is great and the poems are too, and I learned more about squirrels and other animals reading it than I ever did in school as a kid. If you've got a science-loving kid, get this for them.