That is awesome!!
I let my 5yr old daughter play pinball on my tablet all the time. Her hands are small enough that if she takes both thumbs off of the tablet while she's holding it the tablet is unstable. The other day I was playing my pins with some friends and she came down, turned on Getaway, hopped on her stool and was playing like a pro! She used to just flip like crazy but watching her now she is timing her flips and even catching the ball sometimes.
Now when we have friends over that have kids, my daughter plays with the other children and gets frustrated with them if they just keep pushing he buttons. Makes me proud