I am 34 and I've been coloring a lot lately!
I also bought a couple of Christmas Stocking Kits (felt) to sew for my niece and nephew.
These activities help me pass the time without getting overloaded with stimulation.
You could knit or crochet or do some type of craft type thing as long as it's not super complex and involved. (And depending on your current level of functioning you may want to steer clear of hot glue guns, paint fumes, soldering irons and live circuits....)
If you're able to take walks, that might be helpful too because it will provide your brain with more Oxygen which will help it heal.
Before the injury I sustained, I very rarely watched TV and didn't even own one because my lifestyle was so busy... and now we have satellite TV just to help keep me entertained. (I just wish it was more entertaining...!)
Hang in there!!