Einstein's Riddle--The Zebra Puzzle; there's no evidence to support Einstein's authorship of this puzzle, nor the claim, but it's still a fun riddle
20 ways to use old doors . use old doors in a new way with these great ideas for turning old doors into something useful & new for your home . shelves, benches, swings, etc .
Optical illusion gif- just look at it for 30 seconds then look at something on the wall-