I'd like to give a therapist's perspective on this topic. First and foremost, gifts are never required or expected. To all of you amazing parents out there who work with your child day in and day out, you have enough to focus on; you don't need to worry about getting a present for your child's therapists and teachers.
If you'd like to show your appreciation, I think I speak for all therapists when I say a heartfelt note expressing your sentiments is the best gift you can give. If you don't believe me, notice the date on this card below (and I still have this card today!).
Handmade cards are also appreciated, such as this Valentine's Day card.
Here is an example of another homemade gift, which was accompanied by a pot of flowers.
Another unique gift that a colleague of mine once received was the book, Ten Things Every Child with Autism Wishes You Knew by Ellen Notbohm. The therapist could then share the book with colleagues and other families, so it was a gift that just kept giving!
As far as candy and baked goods go, my opinion is that you can't go wrong! However, there seems to be mixed feelings about this in the discussion over at Love That Max. I feel it is an inexpensive gift for parents to show their appreciation, and it is something that we can share with our families or colleagues if it is more than one person should be eating!
4/9/12 Update: Check out this bag that I received as a gift. Probably the most useful gift I have received!
Therapists, teachers and parents, what are your thoughts on holiday gifts?