A sufficiently large family gathered around one table makes dining difficult. It can get frustrating to spend too much time passing dishes back and forth instead of shoveling goodies in one's mouth.
Matty Action writes that his father-in-law built this replica Thomas the Tank Engine train set to facilitate the process. Watch it slowly circle the table like conveyor belt sushi, repeatedly offering each dish to each diner.
There's at least one potential drawback: it becomes increasingly difficult to decline your aunt's disgusting green bean and mushroom casserole when she mentions it every time it passes by your position.
-via First We Feast