Putu n Pitu

Hey there ... I just scribbled around and came up with this idea (just a rough sketch but anyway).
I'm thinking of drawing a little comic series with those two and I'd appreciate your opinions.

I call those two Putu & Pitu (as in poo to and pee to). They are two twin brothers, a nice and cute one (Putu) and a mischievious one (Pitu). Pitu will always try to play pranks, more or less successful, so it's never clear who of them will win in the end.

Tell me what you think, thanks a lot. ^_^