Wondrous Item, uncommon
This bag has an interior space considerably larger than its outside dimensions—roughly 2 feet square and 4 feet deep on the inside. The bag appears empty and placing any item or creature in the bag will cause it to be ejected out. Upon reaching in the bag the user is granted 1 fully inflated balloon of their desired color. The balloon is non magical and of standard size (5cm x 175cm) and durability. If the user tries to use the bag for any purpose other than an endless source of balloons (i.e. breaking a well planned and thought out encounter or puzzle) the bag will instantly explode causing 999 D20's worth of damager just to user!