1. a jar
2. scotch tape
3. a ruler
4. a permanent marker.
How to make it:
1. use the ruler to show you where to mark in inches on the tape, mark it in permanent marker.
2. Put the tape on the jar (remember to have the bottom of the tape at the bottom of the jar).
3. If the tape goes over the top of the jar cut off the extra parts.
4. When it rains leave it outside to see how much it rained!