I found a caterpillar on my mint plant today.  Foolishly, I let him stay, planning to take him outside later today.  Tonight, I found that he had been rather hungry...

There is also some swiss cheese and an apple in my kitchen, I seem to remember the caterpillar in the book eating through those too... 
(no photo of the caterpillar, he was evicted.  don't worry- I just took him outside.)