Richard Steve Goldberg is a 56 year old pedophile Pied Piper who molested at least six girls after using ducks and Barbie games to lure them to his California home.  Yesterday he was placed on the FBI's 10 Most Wanted List.  Goldberg is an aerospace engineer and a Brooklyn native who took pictures of sex acts with the girls, all under 13, and stuck them in his computer at his Long Beach home.  While none of his alleged neighborhood victims said the six footer was violent, cops said that the gun buff, who has been on the lam since July, should be considered armed and dangerous.  The FBI if offering a reward of up to $50,000 for information leading to his arrest.