I know this is probably not a new idea to many, but thought it should be mentioned anyway.
Craig's List is a fantastic place to look for freebies from toys to clothes to house wares and furniture. We got a backyard play set (wooden with swings, slide and playhouse) for free on Craig's List. My hubby just had to take it apart and bring it home. It took a few days, but he got it set up in our backyard and our boys have a blast on it.
You may not find the item you are looking for right away, but keep checking the free stuff frequently. Free items are always being added on Craig's List, and it can get addicting checking the listings, so be forewarned, lol.
Plus, people list things for sale very cheaply on Craig's List, so check there before you go out and buy a certain item at the store.