Quite recently I bought a motion sensor LED light for the toilet. I'd seen it on wowcher or some similar site, but I bought it elsewhere. It was less than a tenner but it's so frickin brilliant I can't believe it didn't occur to me to look for something like this before!
You stick your batteries in, plonk it on the toilet rim, and your children can get up in the night and manage to wee IN the toilet and not all around the rim and on the floor (yes I have boys) without waking themselves up too much because they have to put the main light on in the bathroom.
(and its useful for DH too)
The batteries ran out recently, and immediately DS1 reverted to 'muuuuuuuum I need the loo' because he didn't want to go in the dark on his own.
Anything else I need to know about?