You can make nice little self watering pots with a 3d printer and the right filament.
Those extending swords are really fun.
There are also 3d puzzles you can make.
You can also print models you'd like to paint as minis. You just need the model, sandpaper, primer and some paint.
Why isn't syncthing there? Is there something bad with it I'm not aware of amor are they just not aware of it?