Practices Tips for T-Ball
5 Minutes - Run the bases: Practice running through first base and play follow the leader around the base paths.
5 Minutes - Stretching: Arm circles, arm stretches, calf stretches, hamstrings, quads, and triceps
30 Minutes - Stations: #1 Batting, Show children how to hold a bat with proper swing. Using the tee, have kids take 5 swings each. #2 Catching, show children to catch with an open pocket without closing glove. Using baseball, have children throw underhand to each other without using gloves. #3 Ground balls, set up kids in pairs and have them roll the ball to each other. Show them alligator hands to catch the ball with two hands. #4 Throwing, show the children proper throwing by showing them the T form. Use the glove hand, have kids point elbow to target and throwing hand forming an L shape. Feet shoulder width apart, have them take one step and throw.
15 Minutes - End by running the bases again. Have the kids run to first base, then second, then third, finally all the way to home plate ending with a slide.

Setting up a Practice for 8 - 12 years old's
Here is a video from Newport Beach Little League showing a sample practice averaging 1 hour and 30 minutes.
Newport Beach Little League sample practice.

Here are videos showing practice drills
 Fielding Drills #1
Fielding Drills #2
Fielding Drills #3
Fielding Drills #4
Hitting Drills #1
Hitting Drills #2
Hitting Drills #3
Hitting Drills #4
Hitting Drills #5
Outfield Drills #1
Outfield Drills #2
Outfield Drills #3
Outfield Drills #4
Outfield Drills #5
Throwing Drills #1
Throwing Drills #2
Throwing Drills #3
Throwing Drills #4
Pitching Drills #1
Pitching Drills #2
Pitching Drills #3
Pitching Drills #4
Pitching Drills #5

A coach coaches all kids, meaning, your team and the other team as well. Together, we can create the love of baseball by making practice fun. Good luck to all and most of all, have fun!