How do you reconnect with your son after 30 years?

At least now he doesn't feel ashamed of me for being the town nut, but even if most of my memories are still fuzzy, I know that before he wrecked my mind with the memory-erasing gun, we were very close. I know I let him down, but I want to fix it! The problem is the how. Do kids now still like the same things they did 30 years ago?

Or I could build a giant robot like last time....