Routines definitely help provide structure, which is so important for visual learners especially! The document folder is a lifesaver - everything is at hand and the kids love seeing that visual representation of their week/month etc.
I try to do one-on-one special time with each kid every day. 20 minutes each, but it makes such a huge difference and the other siblings don't feel left out. I also try and include everyone in the activities - so if it's a sport, I'll adapt it to their skill levels, or if it's crafts, I'll give each child an age-appropriate version of the same theme.
For adaptive sports we've been doing a lot of hooping lately! I got some weighted hoops which are easier for the younger kids to use and we measure and chart everyone's progress - how many times they can get the hoop around their waist, or their arms, or even just above their knees. The older kids encourage the younger ones, it's really sweet. We've also been doing some adaptive yoga using yoga straps, and of course lots of modified games like sit-down basketball.
For crafts I usually have a few different stations set up with different art materials that they can explore - playdough, painting, collage etc. And I try to make it sensory too so lots of textures and sometimes even smells! We've been making some cool masks lately with all the kids helping each other.
The key is lots of preparation and having many different options available! Always keen for more ideas too though, as the more the merrier!