| Category | Activities |
| Badge | Scientist |
| Time to allocate (mins) | 15 |
| Outcome | This tool measures how fast the wind is blowing. |
| Resources | Cup with lid 4 cups Straws Pin Tape Marker |
| Instructions | How to make one: Make the base, as described in the weather vane instructions. Make the top: Take four dixie cups. Punch two holes in each, across from each other. Then take two straws. Make a plus sign (+) with the two straws. Poke a pin through the center of both straws, and then tape them together. Slide a cup on each straw end. Make sure they’re all facing the same way around the circle. Mark one cup in some way (like choose a different color cup, or mark an X on it.) To use: Fill the cup with water, then put this outside in the wind. Each time the marked cup passes you, count one rotation. Set a timer for one minute and see how many times it rotates in one minute. |