Most players in this age group choose to have their own bat that suits them best. A team bat will be provided but may not work well for all players.
If you choose to get one please keep in mind that bigger is not better. In fact, a lighter bat can be controlled better and swung harder for greater success at bat. for 9u a 30 inch, 2 5/8 inch max diameter, unlimited length/weight drop is the maximum bat size - bats with greater than 2 ¼ in. barrel diameter must be marked “USABB” or stamped with BPF 1.15” (Bat Performance Factor)