Snow Globe

A long shelf of real-looking glass and water, one globe per monitor, with a tin train running behind them. Look through the water: the whole room is in there, upside down.

Things you can do

• Shake a globe: grab it and drag. Snow lifts off the ground, swirls, and takes its time settling again.
• Thump the table. The closest globes jump first and the knock travels down the shelf.
• Blow the whistle and the train picks up speed.
• Customize: a cabin, a pine forest, a lighthouse or a snowman inside the glass; four rooms; four pedestals; flakes, powder or glitter; tinted water; one to three globes per screen.

Every monitor

• In Chrome or Edge, open Customize and click Every monitor. The browser asks to manage windows on your displays; say yes, then click once per extra screen and once inside each new window. It is one continuous shelf, and the train rolls from screen to screen.
• Add #embed to the address for just the shelf with no controls, handy for kiosk and web-screensaver setups.