content: I have now purchased all of the books in this line for my 2 yr old son & they are all wonderful!! I have a vast book collection for my son & these are by far the most interactive!! Superbly done, the creativity put into these books is truly incredible. They are very sturdy books, so even the kids who like to rip & tear (my son) would have a hard time damaging these books. I highly recommend every title in this collection, Shapes, Numbers, Colors, Letters, Dinosaurs, Things That Go, & the Christmas book. You & your little one are sure to love them too!!