| Signage Winner |
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| Sam's "We Can Change" artwork is our April Winner! Sam is a seventh grader in Ms. Magnus' class at the Wang Middle School in Lowell, Mass. |
| Runner-Up |
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| Reybekah's "Be a Hero - Plant a Tree" artwork is our April Runner-Up! Reybekah is an eighth grader in Ms. Piekos' class a the Bartlett Community Partnership School in Lowell, Mass. |
| Honorable Mention |
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| Leonardo's "3 Tips to Stop Climate Change" artwork is our April Honorable Mention! Leonardo is an eighth grader in Ms. Glaser's class at the North Central Charter Essential School in Fitchburg, Mass. |
| Honorable Mention |
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| The Cool Science second Honorable Mention for April 2013 goes to Caitlin, a ninth grader in Ms. Marcoux' Wilmington High School class, for her creation "Ocean is Rising." Congratulations Caitlin! |