Playground and waterpark manufacturer SCS Interactive Incorporated developed the concept of the Foam Factory in the 1990's as an indoor attraction for parks and family entertainment centers. The concept was an enclosed playground filled with interactive elements on multiple levels including thousands of foam balls that could be shot, thrown and poured through a variety of devices. 

Added in 1999 as part of the brand new Looney Tunes Seaport, the Bugs Bunny Fun Factory was one of the more unique attractions added as part of the War on Lines. Six Flags added similar fun factory attractions at many of their theme parks as they upgraded their children's areas and introduced the Looney Tunes characters in newly branded Six Flags parks nationwide.

The colorful multi-level play area was given a nautical theme to match the seaport surroundings of the new children's area.  Inside, a central lighthouse structure was the focal point and throughout the attraction were air powered guns, canons, vacuums, and even a stove that shot, slurped and otherwise moved the thousands of balls.   
The Fun Factory offered a shady spot on warm days, though it was often hot inside between the sun on the roof and the heat generated by the air pumps. On rainy days families often sought refuge inside where kids could be entertained no matter what the weather was doing.
The Fun Factory featured a wide array of whimsical and colorful theme elements. The figures, signs and other pieces served as targets for the guests, though the most popular targets were always other guests.
Throughout the Fun Factory there were elements that would periodically spray or dump the foam balls in large quantities. A rowboat with Elmer Fudd would periodically tip over and pour all the balls accumulated through the vacuum tubes. The central lighthouse would similarly periodically erupt, spraying hundreds of balls in all directions.
Children loved playing throughout the Fun Factory whether with the foam balls or climbing on the indoor climb structures and sliding down the slides. The foam balls were quite often found some distance from the Fun Factory building, often being carried away by the young guests.
The Fun Factory was fairly elaborately themed, with decorative elements adorning the outside of the building. One of the things that seemed like an strange choice was the inclusion of a large queue area that was originally designed to be a shaded area. It seemed like an odd thing to have a queue for an attraction that had such high capacity and rarely would be so full of guests that they would have to turn people away or hold them outside. In later years the queue bars were removed.
The slides on the outside of the structure seemed like a good idea until they began to bake in the hot summer sun. As a result the slide on the unshaded side of the building was permanently blocked off. 
While the Fun Factory was a popular attraction, it suffered several drawbacks. The biggest was the maintenance required to keep all of the elements working. The constant wear and tear along with the exposure to weather took their toll. That along with the manufacturer having financial difficulties meant that upkeep options were limited.  Lastly, another issue was keeping out older siblings who would take over the guns and other equipment, keeping the young children it was designed for out of the action.  
After fourteen seasons the Fun Factory was removed from the park prior to the 2013 season to make way for the installation of the kiddie train ride that had been in the Golden Kingdom.