“You have to be carefully taught,” according to the Rodgers and Hammerstein song in “South Pacific.” Lt. Cable and Nelly Forbush sing ruefully about the prejudices drummed into them as children: “You’ve got to be taught before it’s too late/Before you are six or seven or eight/To hate all the people your relatives hate/You’ve got to be carefully taught.” That same sober theme is gently raised in the midst of the silliness and fun scares of this third in the animated “Hotel Transylvania” series about Drac, the doting-to-a-fault vampire dad voiced by Adam Sandler, his daughter Mavis (Selena Gomez), and her very mellow human husband, Johnny (Andy Samberg).

In just about every other respect, it’s pretty much the same movie as the first two, with slightly less clever monster jokes than the first one and a slightly more appealing storyline than the second one. Basically, Adam Sandler gets to do his two favorite things: speak in a “funny” accent voice and be lazy, preferably in an exotic location (IRS, check to see if he deducted a cruise as a business expense in developing this one).

Drac is still over-involved in his daughter’s life, worrying way too much when you consider that it is very difficult to harm a vampire. In case we were not clear on that, it is spelled out for us in the movie’s opening flashback, set in 1897, where vampire killer Van Helsing (Jim Gaffigan) is trying to destroy Drac. But he is no match for a vampire with nimbleness, courage, and imperviousness to any threat but garlic or a stake through the heart. The original story’s third weapon against vampires, a crucifix, is omitted in favor of cartoon secularism, as is the ickiness of subsisting on blood, the inconvenience of sleeping in sunlight, or the problem of marriage between someone with a human life span and someone who never ages. Any concerns about those issues are for Twihards.

These are cute and cuddly monsters, including the Invisible Man (David Spade), Frankenstein and his bride (Kevin James and Fran Drescher), Murray the Mummy (Keegan-Michael Key), and Mr. and Mrs. Wolfman (Steve Buscemi and Molly Shannon), with their dozens of wolf-babies. There’s nothing at all scary about them and they seem to spend all of their time hanging out with each other, first at the resort that gives the series its title and then at Mavis’ surprise vacation — a cruise ship with all the amenities. As Drac points out, that means it’s just his hotel except on a boat. There’s one other big difference, though. He’s not in charge, which is both worrying and a little bit relaxing as well. “You need a vacation from managing everyone else’s vacation,” Mavis tells him. And this will be a chance for them to have some quality time together as a family.

Drac insists that the cruise, headed for the Bermuda Triangle and the lost continent of Atlantis “is not the Love Boat.” But he is beginning to think he might be interesting in finding romance (the vampire term is “zing” for love at first sight), many years since the death of Mavis’ mother. He even tries to find someone he’d like to swipe right on on the monster version of Tinder, called Zinger. And then, he takes a look at the beautiful — and human — ship’s captain, Erika (Kathryn Hahn), and ZING.

There’s some “monsters gotta be monsters” stuff — “We’re here, we’re hairy, and it’s our right to be scary!” Though of course they’re not scary after all and as in the other films it is the humans and their unwillingness to look beyond the tentacles and fur to see that just like us, monsters love their families and don’t want to hurt anyone. There’s a lot of silly stuff, a cute dance number, some appealing if uninspired pop song selections (Bruno Mars, the Beach Boys, the ubiquitous Mr. Blue Sky), plus the one song no one can resist dancing to (I won’t spoil it, but the audience groans suggested no one was surprised). It turns out music does have charms to sooth the savage beast after all. And this movie has enough charm to soothe little savages on summer vacation for 90 minutes or so.

Parents should know that this movie has some schoolyard language, potty humor, peril and violence (including attempted murder of monsters and a character who is badly injured and ultimately almost entirely prosthetic).

Family discussion: Why did Van Helsing hate monsters? Which monster would you like to be and why?

If you like this, try: the first two films, Monster House, “Igor“