I popped my 4x4 cube. How to reassemble it?

I advise AGAINST Superglue

Look for a YouTube video.

I’ve done that with 3×3 Rubik’s Cubes before, and maybe with a 4×4 – I don’t remember for sure about that.

With the 3×3, you just sort of start putting it together, and then the last few pieces can be squeezed into place with a bit of force. I think maybe the 4×4 has another trick? Can’t remember.

I think I did this when I was a kid. Isn’t there like a sphere inside and, I may be remembering this wrong, but I feel like there are some pieces permanently affixed? So you just have to start putting the pieces in correctly as they would go.

Yeah, IIRC, that’s right for the 3×3 one, anyway – the 6 faces that go straight out are attached to the core.

Ok, I broke down and watched a videos. At least some 3×3 cubes have no ball in the center, but a 6-spoke thing holding onto the center faces.

The 4×4 has a more ball-like center, though it’s made of several parts.

On the 4×4s, all the faces can be removed.

SO, to answer the original question, it’s involved – you want to get the corner pieces right, and assemble sections before attaching them, perhaps with the help of some tape.

Here’s one video on it. There are many such videos about doing it. https://puzzles.wonderhowto.com/how-to/disassemble-and-reassemble-4x4-rubiks-cube-puzzle-270547/