Mark Anscombe's squad went through their paces at the Judge's Road venue, taking part in an Open Training Session after the Derry youngsters had showed off their own skills in an earlier Mini Rugby Exhibition.
Ireland internationals Stephen Ferris, Paddy Wallace, Chris Henry and Tommy Bowe were among the most popular targets for the autograph hunters.
Returning winger Bowe also recently made a surprise visit to the Centra-sponsored Ulster Rugby Camp in Letterkenny where he was greeted by some thrilled youngsters.
Wrapping up the action in Derry, there was a Skills Challenge where some of the Ulster players passed on tips to current players and members of the public who could become potential Ulster stars of the future.
Click here to view URTV's highlights of the day in Derry, including footage of the players training, signing autographs and being interviewed