Waiter's Tray: A Fun Brainteaser Puzzle! Serve up a classic conundrum with this waiter's tray puzzle. Can you move the six bottles in such a way that's possible to remove the tray beneath? It's harder than it looks! From legendary (and diabolical) puzzle designer Jean-Claude Constantin, this bottleneck of a puzzle tests your special reasoning, logic and strategy skills. Slide the bottles up and down until the tray at the bottom slides all the way out. Recommended for ages 14 and up. Comes packaged in a black wooden crate. Material: MDF, metal, and Lucite. Packaged Dimensions: 8"W x 4"H. Assembled Dimensions: 4"L x 5"W x 4"H.