Thought I'd start this and see if there were an interest in throwing around gift ideas. My family says I'm a great gift-giver, though I'm having a harder time thinking of ideas this year.
Getting the brother a pair of Guardian clubs. They're odd, and I like odd gifts, but he's got shoulder problems and they're great for that.
The father I was thinking of Skillshare, but that seems to be more tech-related.
For the nieces I was thinking about those inflatable sumo balls so they can run into each other, though reviews seem to say they pop easily.
Still wondering about the sister-in-law and the regular sister.
edit: Oh. I see the site autocorrects. No such thing as "Guardian Clubs". The name relates to the country of India even though they were first used in Persia. But the clubs' use migrated to India, where the British gave them that name. Their shape has changed a little over the years, largely to make them easier to pack because British folks liked to take them home to England. They're excellent for low-impact forearm and shoulder and wrist strength, making Persians some of the best wrestlers in the world for centuries.