Child Horde

Rush. The Children rush at whoever they're attacking, (15 by 15 ft radius). If you're size small or tiny, take 8d6 bludgeoning damage. If your medium or higher, make a Strength Check. Higher than 10, nothing happens, and you hold your ground. Failed, take 4d6 bludgeoning damage. 

Club. Melee Weapon Attack: +1 to hit, reach 5 ft., 1 target. Hit: 5 (1d4 + 2) [Bludgeoning] damage. 

Pitchfork. Melee Weapon Attack: +2 to hit, reach 7 ft., 1 target. Hit: 7 (2d4 + 1) [Slashing or Piercing type] damage. 

Hambats. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 through 3 target's. Hit: 19 (6d6 + 3) [Bludgeoning] damage. 

Slingshot. Ranged Weapon Attack: +1 to hit, range 20/30 ft., 3 target's. Hit: 4 (1d4 + 1) [Bludgeoning] damage.

Meat Shield. If one child is lower than the rest, the horde pushes that weakest link to the front, and they take all the damage, (and probably die). 

When the Child Horde collectively gets under half health, their hatred bubbles over, and all become enraged teenager's. 

Legendary Action Name (Costs 5 Actions). As a legendary action, they can make 2 Club, Pitchfork's or Slingshot attacks, or every child does 1 hambat attack.