What mattresses fit a twin-over-full bunk?

The top bunk takes a standard twin mattress and the bottom takes a standard full. For the upper bunk, keep the mattress thin enough that the guardrails still sit above it.

Is the top bunk safe for young kids?

It has safety guardrails on the upper bunk, which is the main safeguard. Most bunk makers recommend the top bunk for children age 6 and up, and you should confirm the weight limit with the seller.

Does it include a ladder?

The listing does not spell out what is in the box. Ask the seller to confirm whether a ladder and slats are included before you order.

Can the bunk be split into two separate beds?

The listing does not say whether the frame converts into a separate twin and full bed. Confirm with the seller if you want that option.

How hard is it to assemble?

Metal bunk beds of this type typically take two people an hour or more, mainly to lift the upper frame into place. Follow the order of steps in the manual and tighten bolts after the frame is square.