Materials List: Tension Racers!

Each group needs:

  • 1-2 ft (30-60 cm) strips each of four different materials for "runways," such as wood, metal, glass, plastic wrap, wax paper, etc. (let your imagination guide you)
  • 1-2 ft (30-60 cm) strips of scrap cardboard or plastic, on which to wrap non-rigid racetrack materials
  • something to elevate one end of the material strips (such as a shoebox or a wall)
  • several sticks of modeling clay, to attach the strips to the elevated support
  • several drops of water
  • metric ruler
  • pen or marker
  • scissors
  • tape
  • stopwatch
  • eye dropper (or more eyedroppers per team if you want to race drops simultaneously)
  • (optional) paper towels, for wiping off tracks and for clean-up
  • (optional) food coloring