5 stones/jacks or various names were known as knucklbones in NZ, you could get metal versions with instructions for each challenge or we also used to save the knuckles from joint of meat i.e lamb knuckle.( as Nanna52 said ) My brother had such chunky hands he'd have all five 'bones' on back of his hand all the way through quite often ... I'd challenge him with 5 even stones off the road to make it fairer. We were about even at marbles

Most of our toys were home constructed or adapted from something else.
Christmas being Summer time in NZ meant stockings were usually filled with bucket and spade, tennis ball, cut out books or colouring books or cheap toys.