I wouldn't brain attempting a type of weighted vibration bars that Use a grip in the center and weights on the top. You hold them in a variety of positions a person handed and two handed, and move your hand/hands back and forth with your arms in different positions https://coingenius.news/learn-how-amazon-ads-created-a-generative-ai-powered-image-generation-capability-using-amazon-sagemaker-amazon-web-services/