Terrarium

One long glass tank across your monitors, with a lizard or two who have things to do. They warm up under the lamp, cross the tank for a drink, and hunt anything you drop in.

How a day goes

1. They get cold. A chilly lizard walks to the basking rock under the first lamp and sits there until it has warmed through.
2. They get thirsty and hungry. The water dish is somewhere else on purpose. Long walks are the point.
3. The lights go out. At night the lamps switch off and everybody heads for the rock cave.

Things you can do

• Drop a cricket and watch the nearest lizard stalk it, then lunge.
• Mist the tank. Beads of water land on the glass, gather, and run.
• Tap the glass and everyone nearby bolts, usually for the cave.
• Pick a turtle and the dish becomes a shallow pool. It plods over to swim, stretches out to bask, pulls into its shell when you tap the glass, then peeks back out when it feels brave. Offer it a strawberry or a lettuce leaf and watch it take bites.
• Customize: leopard gecko, bearded dragon, green anole, blue-tongued skink, box turtle or red-eared slider; desert sandstone or tropical forest floor; lamps, dusk, moonlight or a full day and night cycle; how many, how big, how many plants.

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 tank, and the lizards walk from screen to screen.
• Add #embed to the address for just the tank with no controls, handy for kiosk and web-screensaver setups.