Solve a 5x5 Cube

What can we use instead of a 5x5 cube or a camera if those are hard to find?

If you don't have a physical 5x5 cube you can practice the same center-building and edge-pairing steps in a 5x5 simulator app or on a 4x4 to learn the patterns, and if you can't take a photo/video you can instead document your solved stages with notes to share later instead of posting to DIY.org.

My edges won't pair or the centers get scrambled—how do I fix this?

Use the inner-slice moves and face turns described in the instructions to separate and re-bring the three matching edge pieces together for that unpaired edge, undo recent moves if needed, then re-check that all centers are 3x3 before continuing as a reduced 3x3.

How can I adjust the activity for younger kids or make it harder for older kids?

For younger children shorten the scramble to about 20 turns and focus on building a single 3x3 center with guidance, while older kids can increase difficulty by timing full reductions, learning parity algorithms, and practicing 3x3 algorithms like R U R' U' slowly and then faster.

How can we extend or personalize this 5x5 solving project once we can solve it?

Extend the activity by timing solves and tracking improvement, learning and practicing 5x5 parity fixes, customizing the cube with stickers or decorations, and finishing by taking the photo or video of your solved 5x5 to share on DIY.org as suggested.