Doctors use different treatments for people with Cerebral Palsy. Surgery is one option. Botulinum toxin injections are another option; these are given directly into spastic muscles to weaken them temporarily. Regular ongoing treatment (splinting, stretching and exercises) is another option. The investigators want to find out if surgery works better than Botulinum Toxin (Botox) injections or regular ongoing treatment (therapy), and if the effects of Botulinum Toxin injections last for longer than six months.