Three Year Old Loves This!
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This book is great, including a first lesson in conserving trees, and the dangers of uber-commercialism. There are some things that might be concerning to some parents, such as the lines "You poor stupid man," and "Shut up if you please." There's also the chance that children might not understand that some cutting of trees is done in a safer way, that isn't so terrible for the planet.

My daughter loves it at 3 years old, and has remembered most of the lines as we get to the page.