Leo lagana, and rashi is Aquarius. The child is born Shatabhisa Nakshatra of Rahu. Rahu is in the lagan which is never good and conjoined with Mercury lord of 2nd house and also the planet for communication. Rahu mahadasha is going on and Shani sade satti. As you say he is hyperactive and the child has autism. You should do the below remedies and he should be fine.
1. Make Donation every Saturdays
2. VIsit Hanuman temple every Tuesdays
3. Wear Silver kara