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You Google free jigsaws. I use a site called Lena Games Bigjig. I found it the best but it wasn't free, I paid around a tenner, and got over 300 puzzles, there are often new sets too, all free as I paid my tenner. You also get free a new puzzle every week and a programme to turn any pictures or photos into jigsaws. I've been using this site now for over 14 years. If you Google it you can look through it all, I can't send you a link from the tablet but will do from my big Computer, if you want me to.
Do any of you have a link to a play-for-fun backgammon site?..
I doubt if we always do ourselves (as a body of people) any good with advances in technology, for example, putting a man on the moon may be a tremendous achievement - almost a miracle when they did it, but what good it did is anyone's guess.