. >> cheryl hurd shows us. >> reporter: a man named bob started this as a hobby, and it grew and grew and grew into this. at the end of december, the man known as santa bob is calling it quits. ♪ >> our biggest nights are coming up. >> reporter: just moments before the lights turn on, we found bob stanley making final preparations for bob's world 2018. >> it's time for to us step back a little and start enjoying the holidays. >> reporter: bob's been decorating his pleasanton home for over 30 years all by himself. at 72, this will be the last time. >> i used to make the things myself out of wood. >> reporter: now his decorations are made out of wire frames and lights, lots of lights, everywhere. >> i love this kind of thing. >> reporter: he doesn't do it for himself. he does it for the kids. >> i like the swing in this. >> reporter: gigi cooley has enjoyed this for 20 years. >> the community just comes together and we see neighbors once a year that we don't see otherwise, so it's magical. >> reporter: and it's been this way for many generations. >> i think it's an amazing place and i