Roketz - Free Download (actual legal abandonware) (Score 1)

It's a bit old but it's heaps of multiplayer fun and you can play a round in five minutes. No long attention span required.

http://www.bluemoon.ee/history/roketz/index.html

Drop your damage down to one and leave hers at full. I used to play with my eight year old brother and it was very easy to balance the abilities. As she gets better nudge your damage back up.