POPULAR THEORY

Here's the good news up front: this one delivers. It's an adorable, laugh-out-loud family comedy with lots of heart, and it teaches lessons worth teaching — the proper use of science, the gift of family, the value of friendship, and the plain courage of doing the right thing. The two young leads are a delight together.

It isn't spotless. One rude student blurts a strong profanity using the name of Jesus when he gets exasperated. The movie acknowledges, without any salaciousness, that high school boys and girls notice each other. And the heroine twice invokes Darwin's survival of the fittest to describe the social pecking order at school — worth a word afterward with younger kids.

So here's the answer: for most families, this is worth the trip. Just keep a little caution in mind for pre-teens, and be ready to talk about that one line and those two references on the ride home.

Erwin Page is a 12-year-old scientific genius who skipped four grades straight into high school — and paid for it in friendlessness. Even her pretty sister, Ari, treats her like a social leper.

Named after her late mother's favorite scientist, Erwin sets her sights on the Science Fair and its summer scholarship prize. Then a new boy arrives: Winston, a 13-year-old chemistry whiz and instant rival. When Winston spots the flaw in her formula for a gum that could make anyone wildly popular, the two rivals strike a deal — and comical misadventures ensue.

Four stars, and they're earned. This is winsome, hilarious filmmaking that never forgets its heart. Sophia Reid-Ganzert and Lincoln Lambert are adorable as Erwin and Winston, the dueling-then-partnered young scientists, and their chemistry carries the movie. Cheryl Hines, Marc Evan Jackson, and Chloe East are terrific as the aunt, father, and sister rounding out Erwin's world.

The comedy lands because the lessons underneath it are real. When the popularity gum's two test subjects get intoxicated by their sudden fame, the film turns their misadventures into something that actually says something — about isolation, about family, about who we become when power goes to our heads. It's a laugh-out-loud comedy with genuine warmth, and that combination is rarer than it should be.

At its core, this is a film with a strong moral spine. It exalts exactly the things worth exalting: family, friendship, the effort of getting along with people, and doing the right thing even when it's hard. The heroine's whole arc bends toward a truth Scripture would recognize — people need each other. She even quotes her idol, the physicist Erwin Schrödinger, that "subatomic particles have no meaning as isolated entities." We were made for one another, not for the lonely room.

The film also weighs the question of power. When the popularity gum is offered to the shy comic-book fan, he first pauses over the great moral responsibility such a gift would carry. Later the power goes to his head — a small parable in itself about what fame does to the heart.

Two notes for discerning families. The heroine twice reaches for Darwin's survival of the fittest to explain the social cliques of high school; it's an offhand framing, not a sermon, but worth naming. And a single strong profanity uses the name of Jesus. Neither undoes a film this good-hearted, but both are worth a word afterward.

Underneath the comedy runs the ache Erwin names herself: nobody is meant to be isolated. Scripture said it first — "It is not good that the man should be alone" (Genesis 2:18) — and the gospel gathers the lonely into a family that never ends.

This is the rare family comedy that's genuinely funny and genuinely good-hearted — a smart, warm story about family, friendship, and doing the right thing. A single strong profanity and two Darwin references earn it a touch of caution for your youngest, but they don't spoil the fun. For most families, it's worth the trip — bring the kids and save the after-show chat for the drive home.