Jigsaws and absent-mindedness

I'm addicted to jigsaws - so much that when I finish one I make myself wait a day or two before starting another one. I could sit all day, listening to the radio and jigsawing.

I have wondered recently whether it is good for my brain. Increasingly I find that I forget what I was going to say. I have a thought and go to say it, but within two seconds something else will pop into my head and I forget what I was going to say. Are there any other granny jigsaw fans who have an opinion about this?