Let a 6 month old play with a green or red ball. 5 year later show the same two balls and say you will give the kid an ice cream if it picks the same color. Ob

Let a 6 month old play with a green or red ball. 5 year later show the same two balls and say you will give the kid an ice cream if it picks the same color. Obviously give the ice cream no matter the pick ... Look for correlation.