See below for general drills and practice plans:

Check out the official Little League® page for Multiple videos. 
The Basics / Tee ball Drills 
https://www.littleleague.org/help-center/video-tutorials/


Baseball positive Practice Plans:
Step-by-step, building block approach for drill implementation and skill building over an entire season. 
http://www.baseballpositive.com/practice-plans