I agree with the others - I have a dd who went through sensory OT, and the eval and the therapy were always fun for her - it's been years since she "graduated" (she's 11) and she *still* asks to go back every now and then!
Re the escalation in sensory needs you've seen over the past 6 months, I'd consider looking into whether or not something upsetting might be going on at preschool. You mentioned your ds is "getting in trouble" at preschool - we had a similar thing happen with my same dd around 3 years old, including "getting in trouble at preschool" and increasing sensory stuff - turns out the issue was she *is* a high-sensory child but she was also in a situation where a preschool staff member was treating her badly (and we had no idea), and at the same time she had a medical condition developing that we didn't know about. Chances are neither of those are going on with your ds, but what I'm getting at is it's possible everything that's happening with your ds is simply related to his having unusually high sensory needs, or it *might* be that the changes in sensory needs you are seeing are due to some other type of stress ramping up in his life - and at 3, if he's getting into trouble at preschool, there's a chance something's not quite right there.
Best wishes,
polarbear
