Wood pallets are abundantly available, for free or a nominal cost, anywhere that accepts deliveries of heavy goods. Gather up two or four of them, and you can turn them into DIY bedroom furniture. A pallet bed made with a twin mattress doubles as seating with lots of pillows placed along the back. You can use more pallets as a base for a larger bed.
Obtain 40-by-48 inch wood pallets in good condition with no broken or cracked slats. You will need two pallets for a twin pallet bed and four pallets for a double or queen bed.
Sand the pallets with the palm sander to smooth all surfaces and edges. Round edges and corners that may stick out past the edges of the mattress of the finished bed. This step is important to avoid splinters and may take some time. Wipe the pallets well to remove all sand dust. If desired, stain or paint the pallets now. You can also apply a sealer, clear varnish or leave them unfinished.
Lay out the pallets. For a twin bed, lay two pallets end to end. For a double or queen, lay another two pallets end to end next to the first set. Attach two large hinges where the first two pallets meet, one end of each hinge on each pallet. You may need to use a drill to make pilot holes through the hinges and into the wood. Affix the hinges with wood screws and a screwdriver. Repeat with the second two pallets for a larger bed, then secure the two sets of pallets together with four more hinges. You will need two hinges for a twin bed and eight hingnes for a double or queen.
Attach locking caster wheels to the four corners of a twin pallet bed. For a double or queen, attach two more at the center of each long side. Lock the casters and turn the bed right-side up. Place a mattress on the pallet bed and make it up with sheets and blankets.