Both of my boys are autistic they are 6 and 5. My 5yo has always had impulse control issues and odd interest. For months MONTHS he was obsessed with pouring things through a funnel into t a cup whatever and however he could meet that want. After months of tears and frustration for the whole house the behavior seemed to lessen at least to the point where it was manageable.
He has in the last few days AGAIN started flooding the bathroom or the kitchen and he has dumped sugar all over the floor.
I was SO grateful for this behavior to be gone. I could cry.