7. Build a Snack Mix Machine
This activity that’s up next on our list of quick and easy STEM activities for elementary school students is very useful as children can learn the basics of making simple machines or devices that can change the direction of force. For this activity, you need a mix of snacks, paper, and pencil for designing, a cardboard, a rope, cups or bowls, scissors, and tape or glue. First, you need to design a machine, for example, combine wheel/axle and inclined plane. You can use any carton to make your inclined plane, and you can use tape to help you do that. You need clear cups and a rod to attach them to. Use empty milk cartons to punch holes through and feed the axle through it. Test your machine and change or add a few things if necessary.