While following the trail of 'bottle gardens', we came across this oddly-compelling DIY: a tiny terrarium necklace. Needing little care once it's made, it is a swell way to wear a bit of Nature.See the step-by-step how-to at Ecouterre. You can buy miniature glass bottle charms in a variety of shapes, including the one above, here. We like this globe-ish shape...And of course, you can fill 'em with other stuff...