This stem activity has students build a "sleigh" for Santa using limited resources: an index card + construction paper, a straw, four white life-saver mints, and tape. They must design and build the "sleigh" that will travel the furthest down a ramp. because I mean, Santa has to go to A LOT of houses in one night! You can easily modify this lesson by taking out the holiday aspect and just having students design and build the best car. You can also modify by changing the materials they are given!