Besides the usual back-and-forth we enjoy with WowWee's products, 'panda also reads bedtime stories (we hear that it's fond of Bearinstein Bears), interacts with a MiniMe version of itself, and of course, delivers mad bear hugs to love-starved tykes.

ENGADGET: WowWee: snakes, dragonflies, and bears -- oh my!

It's not uncommon for one last tweet before bedtime to lead to YouTube wormholes, which lead to a few emails, which lead to the inevitable 4 a.m.

WSJ: High-Tech Sleep Aids: The Tech to Get Some Z's

"Exercise is known to help with sleep if you don't do it just before bedtime, " possibly because it promotes overall good health and helps enhance the body's circadian rhythm, which promotes activity during the day and resting at night, says Rapoport.

CNN: Exercise plus sleep may lower cancer risk in women