I made some miniature pallet coasters out of 1/4" wood salvaged from a small chest of drawers that were being thrown away. I just used a bandsaw to tear off thin pieces of the boards and glued them together. This project was inspired by Steve Ramsey's pallet coaster project (http://www.woodworkingformeremortals.com/2013/05/pallet-drink-coasters.html) I liked the idea but I don't have pallet wood to work with and, more importantly, I don't have a planer to take the wood down to size while preserving the texture of the pallet. I do, however, have a bandsaw and I produced a nice texture ripping 1/8" and 1/4" planks off of these little boards. I have seen all sorts of pallet coasters on the internet but Steve's are the only ones that don't look like they're made from popsicle sticks. I would have used his method I don't have the proper tools and my living situation does not permit the acquisition of a pallet's worth of wood for this scale of project.
* 1/4 wood boards
* wood glue
* bandsaw (or something else to rip 1/8" off the boards)
* hand saw and some sort of miter box or jig for cutting the lengths off (optional, I suppose)
* rough grit sandpaper (to remove hanging bits of wood after cutting)
* polyurethane (or some other sealer) (optional?)
Step 1: Ripping the Planks
I ended up using 14 pieices of 1/8" planks and 3 pieces if 1/4" for each coaster, but while making them I just sort of guessed the ratio and it worked out ok.
Step 2: Sanding the Planks
Step 3: Cutting Down the Planks
Step 4: Assembling the Coasters
I just used a carpenter's square to lay out the bottom three planks, glued the middle thicker planks down, then glued all the top pieces across all in one go. I did find it useful to check for any sort of bowing in the wood and place it appropriately. I didn't do this for the first one I built and I had a bit of trouble getting some of the thin planks to glue down to both ends since they were not perfectly straight. It doesn't really matter if they all glue well to the middle though, so if there is any bow just make sure they touch both ends.
I used some leftover thick pieces placed along both edges between the coasters to hold everything together under a weight overnight while the glue set. You could probably clamp them all together but I didn't think it would be a big deal for this project.
When this is all done you could seal all the wood. I haven't done this yet but plan to before using them. I'm not an expert but I have polyurethane laying around so I plan on using that. If you think you know better use your own judgement.