crane with magnet for ikea wooden train
magnet can be connected with arm with a piece of filament 1,75mm

all parts needs to be printed once, nut twice

print settings:
0,28 layer height for almost all parts (bolt and nuts must be printed with 0.2)
no support needed

small magnets can be bought on aliexpress https://s.click.aliexpress.com/e/_DEcJ1n7 or amazon at a very cheap price

/*you are not allowed to sell printed models*/