Reviving the Nook tablet

My kids have been tracing letters on my wife's phone for a while, this runs into trouble when both of them want to do letters and she's only got the one phone.  I've got this Nook Tablet lying around, it's been rooted to get access to full Google play store so putting the app on there should be a quick fix for this.

Had I known this would take me almost a week I might not have agreed so readily.