This book has some interesting parts to share with your young kids, but I expected more tricks than what it has. My 5th grade daughter played with numbers for a while and then she found out there's lots of exception. Afterthat the book was placed in a bookself. It is a good math trick book to make your kids get some interesting on numbers.<br>I've got this book about a week after ordering and I've got a delivery e-mail 2 weeks after that.