Phillip Meyer Eberz over at ojohaven.com has set up this colour-based brain teaser at a school in Texas and he’s posted a refreshing-version on his site.
The idea is to speak aloud the colour you see, not the word of the colour. So if you saw BLUE you’d say “red”. Apparently it’s best to do this with someone because you won’t even realize when you’re doing it wrong.
Via Ojohaven
shape+colour 
Whatcha Thinkin?