Bag of firecrackers

This bag contains an infinte number of firecrackers. Each one explode in an area of 5ft, dealing 1 point of force damage. A creature can use its action to make a sleight of hand check to grab a few firecrackers and throw them. The number of firecrackers grasped its equal to half the Sleight of hand check. The range of the throw is 20/45. 

The bag has an AC of 10 and 5 HP. If hit with fire dmg, its a crit. When the Bag of Firecrackers gets to 0HP, it explodes, dealing 6d8 of force damage in a 15 ft area. Affected creatures can make a dexterity saving throw to halve the damage. On a fail, the creature takes full damage and is considered deafened for a minute.