Chicago, IL - JULY 20, 2015 Some of the past promotions of Happy Meal toys are on display at the Marketing Store in downtown Chicago. The Marketing Store has been involved in McDonalds Happy Meal promotions for over three decades. The Star looks at the process involved in designing Happy Meal toys that are so popular with kids. JULY 20, 2015. Chris So/Toronto Star (Chris So/Toronto Star via Getty Images)
