These nine free online Earth Day games have healthy planet themes like recycling and renewable energy sources. Kids can learn a lot while having fun.

Other freebies the kids will love include Earth Day coloring pages they can print out and complete at home, and printable word searches for offline interaction.

Unravel the pieces to form a complete picture of the Earth. Select a piece and drag it to where you think it should be to swap the two. There is no time limit and the game offers an easy, relaxing change from the usual noisy games.

Choose from an easy, medium or hard level and play the puzzle in any web browser.