water confidence help...

my friend needs to boost his confidence in the water. hes only recently learned to swim, we have however been surfing for 2-3 years. we have done a lot in swimming pools (treading water and jumping in deep end) and hes got a lot better. we are thinking about taking the boards out on a flat day and just paddling around, swimming and jumping in and stuff. any advice or anything?
Thanks in advance,
Sarah k
Thanks in advance,
Sarah k