@dlowan,
I swear if I could capture the kitten energy in this house I'd be able to run all the electrical items! I guess they'd be net carbon dioxide emitters though?
They've been going totally nutso for two hours solid.....not just running, but leaping high into the air, heavy duty wrestling. Basically playing ice hockey with vitamin lids, toy mice, the shells in my bath (strictly verboten!) plus hide and pounce in mummys quilt. They find time to run in gasping occasionally, and give me a kiss....then off again.
Whatever bad stuff you can say about these woolies, they're the happiest little bastards!