"We just teach them basic drill and make them feel confident about that.
"Usually there's more structure to it, but it's casual as these are kids."
Leslie took the 23 children through four basic skills - ball running, taking the ball into contact, catch and pass, and tackling.
Tawhero principal Chris Dibben was delighted to host the former test player.
"We're very, very privileged to have him here.
"To come back and give to the community is absolutely fantastic."
Most of the boys and girls who took part in the session are Saturday rugby players, he said.
Leslie also ran his programme for adult coaches at Cooks Gardens on Thursday night and at the Taihape rugby club yesterday evening.