Magic Bumpers for twin bed is the best! Bed rails are clumsy and hard for mom to snuggle and read in bed with the litte ones. This solution is a firm enough foam to keep the toddler from rolling out in thier sleep, but soft enough for mom to sit or lay by their side if needed.
DIY Twin Bed from construction lumber: "RustyHacksaw" gives details of how he did it and how he created it to eventually be turned into a bunk bed! The finish is Red Mahogony Varathane with Varathane Polyurethane coating over. With this stain there are lots of options you can see here: http://www.rustoleum.com/product-catalog/consumer-brands/varathane/premium-wood-stains/