budding entreprenuer?

My 4 year old and I at the sink last night while brushing her hair before bed:
Hope: (holding her toothbrush with the Dora picture on it) Mommy, I think I know how they make these
Me: really, how?
Hope: they take the Dora band-aids and stick them on the handle of the toothbrush
Me: like a sticker?
Hope: yeah
Me: that's good reasoning, Hope, it does look a bit like a sticker on the handle, doesn't it?.....
Hope: Can we make one?
Me: a toothbrush?
Hope: yeah, get a toothbrush and put the band-aids on it, make it ourselves
Me: sure we can do that, but we might want to choose stickers instead
Hope: no, it's band-aids and I want Barbie ones.  Then we can put the Barbie band-aids on the toothbrushes
to make our own and then we can take them to the store for other people
Me: That's a good idea, but it doesn't work exactly like that, I don't think the store will buy them from 
us.  Although, maybe as you get a bit older you will come up with some special creation that you can 
actually sell in a store, how would that be?
Hope: yeah, but can we just make a Barbie band-aid toothbrush? please?