I sometimes wonder if age can affect the potency of our Karma.
If I had to guess, I'd say no, but many of my most regrettable actions were done before the age of 14.
Right at the top are things my neighbors and I did to frogs we caught in the marsh when we were boys.
Not too often, but occasionally, it will arise while I'm meditating, and I'll feel a burn spread through my skin. I'm not sure how I'll make up for it, but that will be taken care of regardless...