Dear fishpiewithcustard,
I suggest you go to the following site. Physiotherapy for children | skillsforaction.com On this site a very experienced paediatric physiotherapist has placed many exercises and information.
Of course you need to find out what is wrong with your child and go to the appropriate health professionals but in the mean time, look up what
my colleague has to say on this site.
I will move your mail to the paediatric section... you will probably get more respons there.
I hoop things work out well for you all.
Esther