I guess I ended up mostly catering to the older one for a while but also modifying things to work for both. Like instead of playing with little Legos I made my son play with duplos for a while. Or building marble tracks with no marbles until the very end. Also I probably just enforced rules more and taught the younger one to stop putting things in her mouth sooner. I would set the older one up doing something and then play with the younger one nearby and only help the older one when necessary. Also I have a baby gate thing I could put the younger one in and get 15 min at a time with the older one. It's hard!
