Luvit: a starfield on your ceiling (not stickers either)
I love this Instructable and wish I could do it for me. The author, responding to that clear-but-squishy-edged school of thought that various stimuli are good for infants, created a remote-controlled pattern of fiber optic lights in his soon-to-be-born baby’s ceiling. He can remotely control the overall brightness, the rate of twinkling, and the phases of the moon (waxing and waning):
Full lesson at Instructables