Would it be enhanced by the IMAX 3-D or HFR 3D, or should I stick with the regular?
I tend to get annoyed with 3D hoopla.
From what I've heard, the IMAX 3-D is just too much of a good thing to the point of being distracting.
But kids might like it that way.
I loved the HFR 3D. Not a fan of the LOTR movies but the HFR makes it look like you're watching everything live. This would probably annoy me with most films, but I thought it was pretty cool doing dragons and trolls and shit being presented as if you were watching reality.
The kids will definitely want 3D.
Buy a bootleg Betamax copy
I saw both and the 2D is less hard on the eyes.
The rest of the audience will be enhanced by mouth gags and sedatives for your "kids." Uncle Troll.
Take them to the regular film. They're lucky they're going anywhere. If they were my kids I would never bring the to the movies. That's why I don't have kids
It's about the kids, not about you, OP.
Look up some reviews to see how people have found the various options, then ask the kids.
Buy the book and read it to them
Just make sure you keep your hands to yourself, Jerry.
Here's review that discusses the technical side of the film...