If you really think of customizing your sleeping space with adding trundle bed to your present bed, than you need to get some nice bunk bed and trundle plans. I mentioned both since they may be closely related and both are good space savers.
Of course the best place to look for the free plans to make a trundle bed is the Internet. You can find nice places there with a lot of information on how to build a trundle bed. The name “trundle” itself means the small trundle bed wheels which help to slide the trundle easily under the main bed. The purpose of having such bed points to the idea of providing comfortable sleeping place and at the same time of saving floor space when there is no need in extra bed.
Before you start making your trundle bed, search for the trundle bed kits which can make your undertaking much easier. It will only require some trundle bed assembly and contains manuals how to do it. So there won’t be any problems with that. Still this may not fit everyone since you need the kit wich will ideally suit your bed. It is when you may try to make a trundle bed by yourself.