Exercises for a floppy hand in newborns?

Stimulation for baby: Place objects in hand, big enough not to present a choking hazard, encourage baby to reach for and grasp objects, soft toys.

Not much: If your newborn has Erb's palsy or similar transient process most just leave it alone to self resolve over the few days/weeks after birth. Therapists will sometimes move the arm & wrist through a passive range of its expected future motion several times a day.A newborns hand can be done the same way but seldom needs any attention as it normally remains with fingers curled.