Halfpie's been doing all the right things with his daughters. He comments that any kool kredits that accrue however, must be spent within the weekend or else they'll evaporate. A 48 hour half life.
I reckon the half life of kool kredits is age-related, I only hope it extends rather than contracts with each birthday. In my experience, the younger they are, the more transient moods appear - on the up side, any major disappointment can dissipate with 30 mins of the Wiggles but on the downside, 6 hours of energetic playing is no insurance against a moody bedtime!
6 days ago