For this winter themed STEM challenge students must build the tallest snowman out of marshmallows and toothpicks. This activity is perfect for a Christmas or holiday party. It would also be the perfect activity to do before or after winter break.
Impulsion "Space STEM activities" gives you a mere 89 million hits. Wading through a lot of junk eventually brought some gems that I could implement, and I leave it to another post to rant about the lac.
Winter STEM Activity: Build a Sled
For this winter themed STEM challenge students build a sled that can slide down a ramp.