Log InNotice from CPSC related to Walking Balls: http://www.cpsc.gov/cpscpub/prerel/prhtml11/11185.html. According to the Notice, the CPSC has informed state amusement ride officials of the risks associated with this product and encourages state officials not to permit this ride in their states.
Articles
Notice from CPSC regarding Walking Balls
April 1st, 2011