Parents need to know that any kid who watches this show will probably turn into Gerald for at least an afternoon, communicating only with boings, beeps, and squeaks -- and chances are you'll tire of it long before he or she does. Otherwise, there are no red flags here; since it's the modern version, even the sex roles are politically correct.
Positive messages:There's no strong moral content here, but nothing really negative to watch for, either. A dog burps instead of barks.