This is a Ping Pong Ball LED clock I made recently : r/diyelectronics
Bubble Walls - Church Stage Design Ideas - Scenic sets and stage design ideas from churches around the globe.
DIY Ping Pong LED Wall v2.0 - YouTube
Ping Pong Led Wall IoT connected - YouTube
Amazon.com : Franklin Sports LED Table Tennis Net and Glowing Paddles and Balls - Portable and Easy Setup That Fits Most Ping Pong Tables - Great for Family Fun Or Pro Play! :
An LED Matrix Video Wall Made Up of Giant Pixels | by Cameron Coward | Medium
Animation test on Ping Pong Ball display - YouTube