Including a backyard trampoline, a playhouse built from window blinds, a flying saucer that doubles as a water ski, and more Summer is almost over SIGH. If you're eager to squeeze in some last-minute leisure, check out these retro do-it-yourself projects, culled from the Popular Science archives. They include a backyard trampoline, a playhouse built from window blinds, a flying saucer that doubles as a water ski, and more. Here's to a rockin' (if brief!) old-school summer.How 3-D printing body parts will change the world. Plus: the 25 best nerd road trips, a look at the milky liquid that lets people live without food, a DIY pirate-proof boat, and much more. Online Content Director: Suzanne LaBarre | EmailSenior Editor: Paul Adams | EmailAssociate Editor: Dan Nosowitz | EmailAssistant Editor: Colin Lecher | EmailAssistant Editor: Rose Pastore | Email s.pageName="popsci|DIY|article|10-Retro-DIY-Projects-Do-Summer-Ends" s.channel="DIY" s.prop2="lacey henry" s.prop3="crafts,diy,popular science,projects,season,summer,vintage" s.prop4="article" s.prop9="10 Retro DIY Projects To Do Before Summer Ends" s.prop10="75848" s.prop11="" s.prop13="" s.prop16="" s.prop18="" s.prop24="DIY" s.prop25="" s.prop17=location.href s.trackingServer='popsci.com.122.2o7.net' s.visitorMigrationKey ='51AB9FA2' s.visitorMigrationServer ='analytics.popsci.com'