When my oldest child was about 5-years-old, we used to play a lot of Candy Land. Very often he would pick a purple card and move his piece to blue, or pick a yellow card and move to green. I was puzzled by it because he knew his colors. I figured he wasn’t paying attention or had lost interest in the game.
One day he made a comment about his coat being grey—and it was dark green. In that moment, I realized he might be color blind.