One of the kids "reacting" to Grumpy Cat said it best when he wisely noted, "That's what YouTube is: kitty videos." Perhaps the most famous star of them all, however, is the cat curmudgeon phenomenon also known as Tardar Sauce. A majority of the youngsters already know everything there is to know about the smug-faced feline. But for those who do not, their reactions are priceless. From uncontrollable giggles to unending questions as to why he's so "angry," these kids have a thing or two to say about the world famous megastar meme. Watch their hilarious reactions now.