Santa

I’m conflicted. I want to do Santa with my 2 year old, which I am to an extent. I’m conflicted about how the presents are distributed. When I got in my husbands life, his kids were 4, 7, and 9. The older 2 didn’t believe in Santa and let the younger sibling know. We probably did Santa for 2 or 3 years here. They are now 10, 13, and 15. How would I go about doing “Santa” presents with my 2 year old if I don’t with my older ones. Do I even need to do Santa? This is the make it or break it year, and now I’m starting to freak out on how to handle this situation.