I'm always losing my keys so I was super-thrilled to find this idea at technabob over the weekend. I couldn't bring myself to drill through a lego piece (!) but after raiding my sons lego box I found the perfect bit to attach the key to (lego part number 3176).
Make this fun Lego car key hanger in four easy steps
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Watch How He Makes This Brilliant Lego Key Holder That's Quite Unique!
Make this fun Lego car key hanger in four easy steps
Keep your keys safe with a colorful LEGO® Key Hanger!
LEGO® Key Hanger