Well we have a cocoon sitting under our trampoline at the moment

DS1 and DH noticed him or her the other day. The caterpillar was sticking out of the cocoon at the time. Next morning, the cocoon was shut. DS1 took it into school the next day for show and share under strict instructions to bring it home that night.

The caterpillar must not have liked being disturbed so broke out, not completeley. We put him back under the trampoline and he wriggled about, I thought the birds would come and eat him.
Next morning he was all shut up again, clever little thing.

So to cut a long story short, I asked DS1 how long it would take for him/her to turn into a butterfly and he said two weeks or there abouts. He knew as he had just bought home a take home reader not along ago about this whole process

So it needs nothing but to be left alone an do it's thing I am hoping, will let you know in two weeks