https://www.youtube.com/watch?v=dBhn5aP71bQ The Fidget Tumbler is a simple yet captivating device developed with fidgeters in mind. The Fidget Tumbler has been shaped and balanced specifically for tumbling. When the stick is knocked over gently on a flat surface, it will roll along its curves until it is caught.
watch video how to play with tumbler
https://www.youtube.com/watch?v=cyeyFUwu9e4