Hello, my kids, 6 and 9 years old, are asking for a stylus for drawing on Ipad. They have Ipads minis 2 and 4 and we also have Ipad Pro 9.7in from 3 years ago that they can use. I would like a good stylus to learn drawing, would spending on Apple Pencil be worth it? Also, which Ipad apps would be easy to use for drawing?