I make them. You can buy the pine at Home Depot and the perches come from trees on my property. There's not much quality stuff out there for chins, especially given how destructive they are. Some good places online are: (broken link removed), (broken link removed) and https://cabirdnerds.com/ for toy making supplies.@Paula , where do you buy all of your ledges/perches at? I bought some online but I am really not a fan of them.