This would be a lawn aerator I made out of a PVC tube filled with sand, some screws, some scrap wood, and some electrical conduit. Works like a charm! :)
Picture of Lawn Aerator
Aerating Lawns: Cheap Lawn Aeration: Make a Lawn Aerator
DIY Lawn aerator
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Learn about lawn aeration, including the best manual lawn aerators, lawn aerator machines, and if lawn aerator shoes are worth the money.
How much effort in lawn care? This is pretty clever... I might end up aerating my yard this way?!