Yes, juggling is really good for memory and learning. In fact it is one of the methods I use in my classes and that people can use at home practicing for exams, lectures, etc.
When I teach juggling in class, I start with lightweight scarves and work my way to beanbag or balls.
I have been a juggler since I was a kid.
I even read that the Devil does not accept jugglers in hell, so apparently the benefits are numerous.