Two teams, each player dribbling a ball, with their non-dribbling hand team X players are trying to knock over cones and team O players return the cones to an upright position (if a player loses control of their ball, put the cone back how it was). Go for 30 seconds, team O gets a point for each cone standing. Reverse roles and play again.
SNYB - volcanoes and valleys - use flat cones, half are right-side up to start (volcanoes), half are upside down (valleys).
See Jr. NBA - Ballhandling (Games).