TV show, How it's made, balls and pins....

[LOUVIT]

Balls
http://www.sciencechannel.com/tv-shows/how-its-made/videos/how-its-made-bowling-ball/

Pins, sorry, this video is not working for some reason...
http://www.bowlingvids.com/how-its-made-bowling-pins-video_8fe549f6f.html