Hi,
I too agree with the above. I see a lot of little 'uns in my private practice although not one with a sprial fracture of the femur before!
Having said that, children are REALLY resilient. It is hard to keep them down. And because they don't know any differently, they will get on with things as they are able to.
Also, i have 3 kids, my youngest a 2 year old. It is DAMNED HARD to get him to do ANYTHING he doesn't want to - what i am trying to say is that the suggestion above about playing with your child is a good one. Trying to impose physio exercises etc would be difficult but a good physio would be able to show you how to use play as therapy.
For my "broken arms/legs", i actually just show them some simple exercises for the few days that your child will be hesitant and likely to be compliant. But i just offer to call them in 2 weeks to make sure they are back to normal. I can honestly say that i haven't had a complication in that time - by the time i call, the parent says something along the lines of "oh, yeah, they're back to normal - i forgot you were going to call!".
Believe me, you will know within a week or two if your child is not going right! If in doubt - just ask your doctor.
Good luck!