The "walking water balls" are a popular attraction even though the Consumer Product Safety Commission warns they can be dangerous.
There's only enough oxygen to last a few minutes and there is no emergency escape.
However, the operator of this ride says there have been no problems.
"We run it safely, the kids are in for three to five minutes, we're there, we're watching," Bobble Wobble co-owner Debbie Flynn said.
The CPSC has received two reports of injuries. One child was found unresponsive after a short time inside a water ball, another suffered a fracture when the ball fell from an above-ground pool.
