T.C.B.Y. is a national chain of frozen yogurt / ice cream shops.  It's nothing special, at least for me, but you've got to see this.  They have something they call "Rainbow Cream".  It's vanilla ice cream with a TON OF FOOD COLORING!!!!   Of course kids love it.  I tried it and it was fine BUT, the next 3 times I when #2 I colored the water quite a dark shade of blue.