My original mini garden got too full of stuff, so I took some of it to start a 2nd one. It also stays outside permanently (though since I just started it this past summer, that's kind of a premature phrase at this point.) Here's some pics from yesterday:
Graptoveria 'Opalina':
Aptenia cordifolia & Sedum rubrotinctum:
Burro's tail (Sedum morganianum):
And here are some update pics of some of the plants in mini garden #1 (that has been outside since 2013.)
Graptoveria 'Opalina' with Haworthia:
with Sedum kimnachii:
Variegated Crassula perforata: