When Simple Was Hard to Do is a sweet story/song that reflects back and reminds children of how far they've come. The story explains how "simple" is now something easy, but didn't used to be [i.e. walking, talking, etc.]. I think this book is also a great way to encourage kids through something difficult they're learning or a new transition they're facing. The accompanying CD is the book in song format, and everyone knows children love anything set to music! The illustrations are also fun and colorful. When Simple Was Hard to Do is geared toward children ages 3-6 and I think Benjamin is going to enjoy it as he gets older.*Non-disclosure: We received a copy of this book in order to review. All thoughts and opinions are my own.