You son is still transitioning and may be easily
over-stimulated. He is also still suffering from the frustration
of not being able to make his needs completely understood. If
there is a developmental delay or post traumatic stress, you have
to add that to the equation. All in all, it's a very tough time
for the family and for the child. Keep stimulation at a minimum.
Because he is still within this transition period, a great many
of his behaviors are going to change and evolve over the next
few years, even more so over the next few months. And if it makes
you feel any better, the button-pushing and light switch on-off-on-off,
toilet flushing, etc. is due in part to his never having had the
power to do any of these things before. It's all novel to him.