The most humane way is live traps. Traps will not present danger to children and other animals. They are inexpensive and you can relocate the rabbits to a suitable place.
You might consider purchasing a small animal trap that catches them without hurting them. Then you can just drop them off near a woods or field somewhere else.
Spread some sort of a 'foul odor' around your yard(fish mulch, animal urine, etc). Try to cover/avoid having plants that make a good snack for rabbits.
