Little League Baseball is constantly changing its legal bat list. The official list can be found at the following link:
http://www.littleleague.org/learn/equipment/baseballbatinfo.htm
If you have additional questions about the bat regulations, you can check the Little League Baseball FAQs page:
http://www.littleleague.org/learn/equipment/baseballbatinfo/USA-Baseball-Bat-Standard-FAQs.htm
If you're having trouble with either of the links above, please visit our contact page.