Christmas movies are fun, Christmas baking is fun, Christmas caroling is fun, but what's the most fun of all? Christmas science! Well at least it is for us around here whether it's making a new slime recipe, trying a glittering eruption, or building a holly jolly catapult! I love science and STEM for the holidays, and you can too. Print out our free Christmas science cards to add extra merriment to your holiday season.