Facebook’s Zuckerberg Builds His Wife a Glowing ‘Sleep Box’

Mark Zuckerberg said he built a glowing wooden box to help his wife Priscilla sleep better through the night without having to check her phone to see if it’s time to look over their children.

The “sleep box” emits a very faint light between 6 a.m. and 7 a.m. -- when their daughters are expected to wake up. It doesn’t show the time as that would stress her and disrupt her sleep, the Facebook Inc. chief executive officer said in an Instagram post on Saturday.