meyers, I hear your point, but you could probably say the same for everyone of his songs. In wake Up, he keeps quoting the yetzer Hara, “Sleep is good, my watch is broken, go back under your covers, etc” And then switching to the yetzer tov. If a kid sings just one part, he will also maybe get the wrong message.
In general, it could be his lyrics are a bit mature for kids, but it doesnt mean its a bad message. When people produce tapes or literature for that matter, they often gear it to one age or another. This is not marketed as a kids tape. For an adult, though, it’s a very powerful message. It’s up to the parents to screen what their kids read and listen to.