Here's what happened:
"On Friday, we went to water our garden and found that the dying Johnny-Jump-Ups (Viola) had been overtaken by very hungry caterpillars. We collected some, along with some of their host plant, and gave them a new home so that we could observe them. Over the weekend, 3 of them when into the "J" stage and are now light green chrysalis's with gold dotted knobs. The other 3 are beginning to act like they would like to do the same. I had my SmartScope handy so I did a time-lapse recording of one of them eating away at a leaf. I have since found out that they are the larva of the Variegated Fritillary butterfly. The children will be thrilled to see the changes and eventually be able to release them back into their habitat."
She set the timelapse at 20:1. It took this caterpillar 4 minutes to eat the leaf, but we can watch it in twelve seconds.