Backyard composting box

https://www.diynetwork.com/how-to/outdoors/gardening/diy-wooden-compost-bins

Cedar, generally.

https://www.diynetwork.com/how-to/outdoors/gardening/diy-wooden-compost-bins

What NOT to use: pressure treated wood, rail road ties, pallets that have been treated (there is a code on them... not sure which ones TO get)... all of these have been treated with hazardous chemicals that can leech into the compost and then into food plants...

What ever you use, be sure to make it large enough that you can get in there and turn the compost over at least once per month.

I have seen people use pallets or whatever scrap wood they happened to have on hand. We used wood pallets ourselves and the composting bins lasted almost 8 years.

Cedar

City of PHX has composting containers made from old garbage containers. When I got mine they where 5$ each

Make a square using cinder blocks, just keep piling them on as high as you want.