My GC just love my stick (blue) and crutches (red) and play with them endlessly - they have been goalposts, struts for dens and (inevitably - sigh) guns.
I worked my whole life with people with disabilities and very few are offended my well-meant jokes - in fact most of the jokes came directly from them, mostly unrepeatable.
I well remember a man with dwarfism in his 70s, and the multi-disciplinary team were tying themselves in knots about how to refer to his "problem" in a meeting. In the end I asked him how he would like his dwarfism to be described in the necessary forms as it was getting ridiculous. His reply was, "I was born f****ing dwarf, and I will die a f***ing dwarf. For goodness sake stop tiptoeing around. I am proud of who I am." He also had a very racy sense of humour and a good line in self-deprecatory jokes.