Running over the coming eight months, the HSBC Rugby Festivals make up the world's biggest rugby union grass roots programme and will be staged across all four Home Nations, as well as in South Africa.
Fresh from his success on the pitch for Leinster against Edinburgh on Saturday, 2005 Lions skipper O'Driscoll met up with his former Lions roommate to coach youngsters and pass on tips throughout the day. In the morning, over 50 children of HSBC staff members were treated to a special coaching session with the two Lions legends, while, in the afternoon, 300 children from 20 teams from across Ireland came together for a festival organised in conjunction with the Irish Rugby Football Union.
"The HSBC rugby Festivals is actually a mirror image of the Lions in that it's a programme that involves all four home nations," said O'Driscoll.
"It is helping to develop the game and getting more kids to play rugby especially in this Lions' season.
"There is a great level of interest in rugby at the moment in Ireland in particular so events like this are great.
"It's good being able to help in however small way to get more kids playing rugby and, hopefully, inspiring more youngsters to pick up a rugby ball."
Robinson, who earned five caps for the Lions in Australia and New Zealand, is already backing O'Driscoll to play an important part when the Lions travel to South Africa in eight months time.
"It's been good to join up with Brian," said Robinson.
"He is a fantastic player who, in my opinion, absolutely deserves to be on the Tour come next May."
Robinson, who retired from professional rugby last December, will be fronting the programme which will involve over 60,000 children and 300 coaches and teachers. More details of the HSBC rugby Festivals will be announced shortly.