My only experience is being the child of a dad with a below hip amputation. Considering he had that at 21 and I was child number 9 when he was 64 it certainly didn't hold him back in some respects
Whilst there were some things he found difficult, he found ways round most things and gave me a lot of his time and involved me in his daily routine. One of my favourite 'toys' was his large tub of swarfega when we messed about with the car - probably not what my mum wanted me to play with, but what the heck!
He also had the old type of prosthesis - the hollow metal tube with a lockable knee and holes that made it a great posting box for small things that would make it rattle and he'd have to take it apart to get them out. At the end of the day, he was our Dad and none of us children had known him before he had one real and one metal leg, so to us it was normal.
My other experience is having a friend who went for elective BKA 2 years after a car accident that left his left tib / fib in far too many pieces. At the time his ds was 7 and dd 4. It took him a good 18 months to get the socket sorted so that he could use his leg for more than 2 days at a time. He ended up going to the unit at Cambridge, but the best limb centre is at St Leonards, near Ferndown in Dorset. That's where Heather Mills and my Dad got themselves sorted.
I was diagnosed with rheumatoid arthritis in August when ds was 7 weeks old, so whilst I have all limbs, the joints don't necessarily do what I need them to when I need them to. I have only had one bath (I do shower instead) since then as I can't get out of it in a hurry and nearly had to call DH to haul me out. Getting off the floor is similarly interesting, but a bit easier. The change in the weather has made everything swell and hurt again, but with a little one I just have to get on with things, which is probably a good thing.
Sorry to have rambled a bit, but if you want to bounce some words about, I'll be checking my threads regularly.