We do have floating shelves in our bedroom, and they are great. We have a very limited capacity to alter the rest of the house, though (as far as like getting rid of the climbable furniture or rearranging all kitchen storage) because we share the house with our father in law, who was here first and owns it.

I've never really dealt with the "mine" thing, and I think I'm glad, because I would have a hard time dealing with telling a child everything belonged to them - even if they were willing to share!

Isaac is a pisces on the cusp of aquarius.

And he can't reach/use doorknobs yet, so that's not too big of an issue. We just can't consistently keep every door in the house closed with the other two kids coming in and out of places all day.