Speedy...

I think Bethany got this Butterfly farm from her granny a couple of years ago.  We only just got round to sorting out the actual butterflies.  You fill in a coupon and they send you a tub with food and caterpillars in it.  Basically just keep an eye on them, don't leave them in high or low temperatures and they eat, grow and molt for about 2 weeks before emerging from chrysalis' and then to butterflies.

I think this is speedy.  Apparently they all have names.