Caterpillars like crazy. Still young to the point where they will fall off your hand if you arnt careful.
How many can you catch? Not as many as me. Don't take them from the nest. Thats cheating. and very rude.
Let them go near plants they like and you might be in the company of butterflies soon.
Or moths if you are really lucky.
Make sure you wash all the barbs off your hands. You'll regret it if you don't.
And watch out where you flick your cigarette ashes please.