Finding treasures on my bookshelf

I haven't managed to make it to the library yet, I'm fighting a bug of some sort, so I've been revisiting my own bookshelves and finding some treasures.  One such book is The Counting Book by John Peter.

This is an interactive book that introduces children to the concept of addition.  It was published in 1957 and has a very unique design.  The inside front cover tells you to cut each page into three strips.  The children then turn the strips to match the pictures and form addition equations.  My four year old loves playing with this.

Though I'm a day late this post was inspired by