Someone suggested knitting as a good hobby for someone concussed which makes sense. It's doesn't take much thought, it's super easy for anyone to start, and it's totally therapeutic.

I agree with the DVD set so she can marathon watch...or perhaps a Netflix/Hulu subscription if she has neither.

If she's artistic, maybe something arts and crafts like. Going through this, it's nice to have distractions but also feel productive - even if it's making a stupid candle or painting, haha.