Yep! my DC2 asked me why the lady was in a pushchair today, in a very load voice as is a 3 1/2 year old wont. Cue me looking embarrased but explaining what a wheelchair is and why some people need one. So off he trots and says to the lady 'Hello, I like your wheels, is it fun'
But she was really lovely with him and chatted to him about her wheelchair.