HELP---How to put one box into the other one

First of all, my English is not so fatastic, so please be patient if there are some grammar errors.I do some designs in the worlds.I make a box and then put the product items in it; After I do another box how do i put the first one into it ? it is only located on the surface of the first box,not actually put in each time. So how do i resolve this problem ? any helps are much appricated.

Hi Andy

--Take the second box (the box that will be inside the other box) in inventory.
--Right-click the first box and select 'Open.' A contents window will open.
--Drag the second box from inventory and into the contents window.

That's all there is to it

wow I do ok now thank you very much Emily !!