Behold the Power of a Free Bobblehead Doll

Roughly 2.7 million bobbleheads will be handed out at Major League Baseball games by season's end. Fans have been treated to 110 different variations of the ubiquitous collector's dolls, and one thing is certain: Fans can expect even more next season.

The Wall Street Journal found that a bobblehead giveaway increases a team's attendance by an average of 4.8 percent over what the team draws each day of the week. There are other factors at play here—such as that day's opponent and who is pitching—but there's enough evidence to suggest that a free bobblehead will drive a fan to the park.