R.K.
hi L. if i were you i'd buy hime the regular underware with the plastic coverings, it's a little more work for the parent if he has an accident, but they are easier to get up and down than the pull ups, and they build confidence because he's wearing "real big boy pants" and not an diaper he can pull up and down know what i jean, i've pottied trained two boys so far, and they did very well with regular pants... hope this helps a little.