A Teenie Beanie Babies "beananza" is headed to McDonald's Restaurants of Central Indiana, marking the return of the most popular Happy Meal promotion in McDonald's history. And for the first time ever, the McDonald's Ty® Teenie Beanie Babies™ promotion coincides with McHappy Day -- a one-day event marked by the sale of a special Teenie Beanie Baby™ only available on June 13 in extremely limited quantities with proceeds to benefit Ronald McDonald House Charities®.