Being a nerd, which is to say going to far and caring too much about a subject, is the best way to make friends I know. For me, the spark that turns an acquaintance into a friend has usually been kindled by some shared enthusiasm like detective novels or Ulysses S. Grant.
There are things that I invented - the creaky geriatric robot that is always grumpy, for example, or the little wheelie guy, he's not in the Hasbro lore. But kids love that stuff - this little guy as a pet on a chain. They gravitate towards it.