@milk Mathematically very improbable.
You would have to not get divorced and the kids take away from you (50%), then your kid would have to not be divorced too (50%x50% = 25%) and finally, your grandkid would have to not be divorced as well so he can keep it! (25%x50%) = 12.5% chance you are allowed to hand it over to him.
I hope god bless you with being the 1 in 10 of men who have grandkids, whose grandkid is allowed to keep his things.