Flicker Firefly is a simple book for children. I say that the age appropriate for this book is kindergartens. The artwork is simple and is beautifully illustrated for children to understand and see. The real concept of this book is not the drawings, but the mathematical questions and problems in the book. Each page has a question about how many certain things are on the other page, such as bumblebees. It gives the children an opportunity to participate and count how many things are on the next page.