There's no limit to the ways you can celebrate Dr. Seuss' would-be 111th birthday Monday, also known as Read Across America Day. The Internet is full of ideas for recipes, crafts and games you can bake, make and play in honor of the children's author and illustrator. Dr. Seuss' books provide a lot of inspiration.

Put on a "Cat in the Hat" hat, cook up some green eggs and ham and try a few Seuss-themed activities. Here are 15 of the best and messiest ideas:

1. Grab a highlighter and try to find "elephant," "smart" and "magical" -- among other terms -- in this word search.

2. Take a counting challenge.

3. Do some drawing.

4. Participate in and fill in the blanks for Dr. Seuss trivia. This premade flier features lines from his famous stories with words missing.

5. Make a Dr. Seuss paper bag puppet. Print out this outline of the author's face, color it in and glue it to the bottom of a bag. Then slip your hand inside and perform his poems.

6. Color in pictures of the Grinch, Horton or Sam I Am.

7. Play tic-tac-toe, swapping X's and O's for for cats and hats.

8. Bake Truffula Tree cupcakes. Take a cupcake, top it with green "grass" frosting, stick a pretzel in it and top with cotton candy.

9. Stack tomatoes and mozzarella coins on top of each other to create a tasty Cat in the Hat hat (in French, chat, chapeau).

10. Make one fish, two fish, red fish, blue fish snacks with Swedish Fish and Jell-O. 

11. Cook up green eggs and ham, of course -- just scramble eggs as normal and add green food coloring. Serve with minced ham.

12. Watch classic Dr. Seuss movies from the 1970s on YouTube. Here are the old-school animated versions of "The Cat in the Hat," "The Sneetches" and "The Lorax."

13. Gather a group to sing the "Read Across America Song" from the National Education Association. Lyrics here.

14. Brew up some oobleck and learn about viscosity. Put on some old clothes, grab a mixing bowl and combine 1 cup of water with 1 cup of cornstarch and some food coloring. It'll be solid when you squeeze it but liquid when you hold it in your hands.

15. Play an online game on Seussville.