Here are some drills you can use:

Warm-up and Stretching
Warm up those muscles by jogging or chasing the ball. That's always fun.

One Foot Only
Have them dribble the ball first with only the right foot, and then the left.

Knock Them Over
Have the kids try to knock down as many cones, as they can in 10 or 20 seconds. This drill will develop their ability to dribble with their heads up.

Red Light, Green Light
Have players dribble from one area to another. When you yell "Red light!" they have to stop, placing a foot on top of the ball. Anyone still dribbling goes back to the starting line. Restart by shouting "Green light!" The first player to cross the finish line wins. This develops listening skill and reaction time.

Monkey in the Middle
Three or more players have to keep the ball away from the fourth. The group in the circle develops skills while playing in close quarters. The player in the middle hones defensive skills and the ability to read where a pass is heading.

Hot Potato
You need at least four players to form a circle. The object is to get rid of the ball as quickly as possible when a whistle sounds. You can do it for fun or make it a "competition" (and the player with the ball is eliminated). This continues until you have a winner.

Small-sided Games
Play one on one or two on two without a goalkeeper and use cones for smaller goals. Due to the size of the teams, you probably will need to have several games going at once. Small-sided games keep every player active and doing what he or she enjoys most about the game: kicking the ball and scoring goals.