Building your own Breeder Reactor?

I guess this story slipped past me since it is about 10 years old now, but anyway, it's interesting.
Here's a quote from the story of how a 17-year-old did it.

When David's Geiger counter began picking up radiation five doors from his mom's house, he decided that he had "too much radioactive stuff in one place" and began to disassemble the reactor. He hid some of the material in his mother's house, left some in the shed, and packed most of the rest into the trunk of his Pontiac.