This bag is made from fur that is either white, brown or black and upon inspecting the bag several small wooden carvings can be found.

As an action the holder can to pull the wooden carving and they utter a command up to 12 words. The carving can then be thrown up to 20 feet o placed on the round. When the carving lands, it transforms into a small wooden creature that the carving represented. What creatures are within the bag are predetermined by rolling 7 d8's. The creature returns to a carving at the next dawn. If it is reduced to 0 hit points then the carving is destroyed and can not be used again.
The creature is friendly to you and your companions, and it acts on your turn and will complete the up to 12 word command to the best of its ability. You can use a bonus action to command the creature to return to you and upon touching it it reverts back to a carving.

The Carving is always of a tiny creature and uses the stat block appropriate to the creature. Once one carving have been commanded in such a way any subsequent carving-creature will do its utmost job to hinder the party and avoid capture.

The user of the bag can place in at least 1 gold piece and after the next dawn for each gold piece that is put into the bag a new carving will be created in exchange. The new carvings will be random unless a small written note with the name of a tiny beast is provided with at least 1 days ration as well as the gold piece for each requested new carving. The bag can hold up to 12 carvings. 

Carving-Creatures

d8 - Carving
1 - Rat
2 - Spider
3 - Bat
4 - Lizard
5 - Frog
6 - Scorpion
7 - Crab
8 - Weasel