White horses remind me of my Grandpa. When I was a child and we saw a white horse, he said it was good luck. He showed me the custom of stamping to get the good luck. My Grandpa is the only person I ever knew who licked his thumb when he saw a white horse. I am guessing he learned it when he was a child in Illinois.
Container: EasyLunchBoxes
Left Side: White Horse – cheddar garlic mashed potatoes cut with a cookie cutter, Eye – dried blueberry, roasted broccoli
Top Right: Pistachios
Bottom Right: Blueberries
Eclectic Lamb 
My grandma, from Texas, always stamped white horses for good luck. She was born about 1895.
Very interesting! My Grandpa was born in 1918.