Bobbleheads are a cycle of seven artifacts from Magic's Fallout release. Each can tap for one mana of any color and has another ability that becomes stronger based on the number of Bobbleheads you control, perfectly encapsulating Bobbleheads in the Fallout franchise.
For example, Strength Bobblehead distributes +1/+1 counters, Intelligence Bobblehead draws you cards, and Luck Bobblehead rolls increasing numbers of dice with a wonderfully improbable alternate win condition attached.