"hands on please touch"

In one site http://www.gilcrease.org/interactive.aspx about interactive spaces it had a please touch statement for kids so that they would not be afraid to interact directly with that space. This museum uses real space and virtual space. I always liked "hands on, please touch museums" as a kid and I think even as an adult I would still like them.
I think it is interesting about our society that most museums have a hands off don't touch policy even though people used to touch artwork all the time. This reminded me of hands on museums I went to as a kid and how delighted I was since I could touch everything and be a kid. I still haven't fully grown up and will always have a bit of the kid in me. If I was opening a museum for kids, it would be hands on.