So,
McDonalds has some cool
Happy Meal toy that you'd love to have, but you, unfortunately, happen to be over the age of twelve and thus look damn silly ordering such a thing... here's what to do!
Always order it to go. Order a normal meal of your own as well. Look like you aren't sure what to order for the Happy Meal, as if you could care less what your younger sibling or child wants. "Yeah, a Coke I guess." "She'd BETTER like pickles." In this way, you are spared embarrassment, have a cool little toy, and more McSubstance.
Or you could just go to a flea market.