Rebecka Holley shared this idea on the BAFM Facebook page. What a brilliant use of space! Rebecca put a lick of pain and climbing hooks on this car port and bam: a fun outdoor activity! The pictured hooks are from Sweden, but I found where you can find them here in Australia: Bunnings sells packs of five in primary colours (check them out here).
For another fun backyard idea, check out this amazing tree house.