melatonin doesn't work for all, but it is sometimes more effective if the dose is split (if for example you get very early morning waking).
dd2 has cerebral palsy. she was dx with developmental delay first, then spastic quad cp just before she was 2, then athetoid cp at 4 after the second mri. we were told she wouldn't walk or talk, but she's 7 now and in mainstream school, going to ballet classes, brownies, learning to ski, and has an iq of 142. she still has cp, but it's only one thing about her, not everything. 
she'll never pass ballet exams, but she loves to dance (we have found a brilliant dance school that run recreational classes), and she's never going to be a calligrapher (but she has access to a lap top), and she's never going to win idol, but she loves to sing (a well intentioned teacher let her join the school choir - she has enormous problems with tone )
she has slowly met all her milestones (she walked with a walker until yr r - when she started ballet she couldn't balance independently so had to hold on to a chair) but still has a fair amount of issues. i can't see her being on a basketball or netball team, however much she loves to play. she wants to learn to skateboard, but i have refused. it's just not going to be possible. most things we can work out a way she can particpate, but i draw the line at skateboarding. she's got an uber cool low rider bike that she can get on and off herself, and that all the kids in the village want a go on (it looks like a go-kart ) and she can pedal fine.
she has damage to the basal ganglia caused by hypoxia (quite standard for an athetoid cp dx) but is doing much better than the neuro suggested. (the neuro was quite surprised when dd2 walked in and had a conversation with her). it's so difficult to make any predictions where the brain is concerned, but stimulation and therapy will always help.
we found makaton really helped with her communication and did seem to kick-start speech - slt put us on a course which was v helpful.