Why not just switch boards with your son?
But yeah, landing jumps on rocker is damn near cheating. You gotta try pretty hard to fuck it up.
But yeah, for rocker with edge hold, look into NS and Mervin. Vario Grip on NS and Magnetraction on Mervin. Try to demo if you can. I prefer Vario, but many prefer Magnetraction. Both work great, they're just different feeling. I think Magnetraction is too grabby but I'm sure it's something I could get used to.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz