totally - they love it!
you do need to be well powered without kid. as their extra weight does change the dynamics a bit.
the new light wind free ride directionals make it so easy. kids can hang 5 - you can even gybe with them.
if you stack in deep water it is a bit tricky to get everything co ordinated get board get kid... get everyone/thing in position. kids need to be super comfortable in deep water. as you and the board go down wind much faster than them. so may require a quick tack back up to get them.
every time i go kiting they want to come along. when the conditions are right there is nothing better than sharing your stoke with them - you should have hear the hoot from my son when he lent out and dropped a hand into the face of a wave we were riding - hooked for life!!!