Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: does this need a mattress only or a mattress and box spring
Document: I bought two of these beds for my kids. All you need to purchase is a mattress. A box spring is not needed...great buy
Easy to put together, box was super heavy. Attractive when finished. Using for my 4 year old so will probably be replaced in a few years but for the price its great.
This bed is absolutely wonderful. We were searching for a nice box bed that was also easy on our wallets. Found this on amazon and decided to order it. The bed arrived in a huge box; it was a bit difficult getting it up the stairs but assembling the bed took only a matter of hours. the instructions are pretty easy to figure out. The bed itself seems very sturdy. All in all its a very good buy.
My only complaint is that the drawer knobs fall out... we have 3 of our original 6 still in place. I just need to buy new knobs and glue them in place as another reviewer suggested, and it will be fine. All in all, I'm pretty thrilled with this bed for the price. I'm actually here on Amazon to buy an identical one for my younger daughter!
Frame took forever to assemble but instructions were clear and easy to follow. I don't like that the mattress sits on chip board or something (unfinished and ugly) and you see it because it's larger than the mattress and you can't hide it with a bed skirt or you cover the drawers. Other than that, it looks good and is functional. Plus it's low to the ground so my 3 year old can easily get in and out on her own.
I bought this bed as a replacement for my 5 year old, who had torn her last one up from too much jumping on it. It was the most reasonably priced white twin bed I could find online, and I knew what I was buying when I made the purchase. It came in a surprisingly small box, containing LOTS of pieces. I had to spread them out on the deck and commit an entire afternoon to the process. It's not difficult, per say, it just takes time.
Pros - cheap, sturdy bed and looks attractive.Cons - Can't complain too much considering the price, but couple things I wish I had known prior to purchasing. First, the frame is too long for a standard twin mattress. As a result, there is about a 6 inch gap at the foot of the bed where the mattress doesn't cover and the frame is exposed. Also, the drawers don't sit flush with the frame when closed.
Bed came with 2 sets of hardware. One in white and one in a natural wood tone. It did make my sons room smell of plywood for about a month. The one weird thing is that the bed is slightly long for a regular twin size mattress when used without the headboard. So, when my son goes to slide off the bed, I have to worry about him scraping his shins (he's only 2, so he doesn't always remember).
Were it possible to leave zero stars I would do it. The bed is PROBABLY a good bed but the board upon which the mattress goes arrived cracked in two and useless. But wait...that's not even the bad part. We called them and they told us very nicely they would replace the part for free and send it out right away. That was almost 2 weeks ago. A few days passed and we finally got an email with a FedEx tracking number. A few more days passed.
i weigh alot and it can hold me up and stuff :) yayyyy i'm a teen so that's no easy thing
Answer: Only a mattress. But be forewarned - the frame is several inches wider than our mattress, which I think is standard. We wound up putting a pool noodle in the gap to keep our daughter from scraping her shins getting in and out.