https://www.youtube.com/watch?v=LAOe8fVPv7c No explanation needed as to why I shared this.
https://youtu.be/f2fADR5sdWE These are cool. If he can perfect them at a reasonable price he should sell the heck out of...
https://www.youtube.com/watch?v=6BtOKX98f0Q
https://www.youtube.com/watch?v=15D_LWIguL8
https://www.youtube.com/watch?v=RsPMwhmQZ0k