The Needle Trick
More often used to predict what a baby's sex will be after
conception, this technique is also one you can try before you
conceive. Suspend a needle from some thread and have someone else hold
it about an inch above your hand. If the needle swings back and forth,
a girl is in your future; if it moves in a circle, count on a boy.
For a variation of this, hang your wedding
ring from a strand of your hair (or use your spouse's ring and hair).
Rub the ring up and down your index finger a couple of times and then
hold it above the top of your outstretched right hand. The number of
times the ring swings around in a circle before stopping will tell you
how many children you'll have.