Entertains My 1-1/2 Year Old...
My 17 month old daughter loves books.  I recently bought her a new selection and this was one of them.  It keeps her busy and she can study the different pages and recognize body parts such as hands, teeth, etc.  She also likes to play peek-a-boo with the baby at the end.

My only complaint is that I've had the book for less than a month and with repeated readings a few pieces tore out and I had to tape them back in.  I know that is a possibility with little hands and lift-the-flap type of books but I thought this was awful soon.  My daughter loves her books and doesn't throw them around or rip or tear at them.
He is very into space and science. It caught his attention and has been a good learning tool that keeps his interest