Be sure to get a few rolls of tippet in 4-6x. If he doesn't know his knots well yet, a paocket sized knot guide card is quite helpful. A fly box with a few woolys, bhpts, midges and soft hackles should be a good start for the caney w/o overwhelming him with choices. A hemostat with scissor is helpful for cutting line, as well as releasing fish. Toss in some floatant and strike indicators and he should be all set.