I was very impressed by the MAKESHOP in the Children’s Museum of Pittsburgh. It had a great setup that invited all ages to participate. At one point, my three year old son, myself, and my father were all fiddling around with circuit boards trying to make neat noises come out of the circuits.
None of the projects were too difficult to start or finish which really made it inviting to everyone that entered the space. The space also had an area reserved for participants that wanted to put a little more effort into a project; they could sign up to work one on one with one of the staff members.