Juggling a three ball cascade is a fantastic basic skill to learn and one that everyone can do.
Roger has put a video together to help you learn how to juggle. He follows the instructions supplied with the Unicycle.com Juggling ball sets. Some people find juggling easy and others find it hard. Roger is definitely in that second category, but he has been learning for a long time! This does make him an excellent teacher. In the video he gives you a good structure to learn and also highlights many of the common mistakes people make when learning.
You can buy the juggling balls and instructions that Roger describes in the video here: https://www.unicycle.co.uk/juggling-section/juggling-balls.html