No matter how old you are, when a toy train pulls up bearing your lunch, you smile from ear to ear. At 2Toots Train Whistle Grill, O-scale toy trains bustle around the '50s luncheonette-style grill, delivering burgers, hot dogs, and fries to each table. These, however, are not just ordinary hot dogs, hamburgers, and chili; they're 100% Grass-fed beef, sourced from national and Chicago news journalist Bill Kurtis' Tallgrass Beef, which means they're imbued with more nutrients and vitamins than beef that's been commercially-raised or fed a diet of candy corn.