Only because I found out that they existed, I bought us a tray of these gorgeous little Ficus Ginseng bonsai trees. For scale, this one is about 25cm tall. They really are lovely, and don't possess the usual bonsai characteristic of 'dropping dead' (most bonsai are miniature versions of outdoor trees, so hate being indoors, whereas this is a specific indoor bonsai tree). We can get Ficus Ginseng up to 1m high, indeed we've just installed some in a Japanese car showroom where they look very appropriate, but can't beat these midgets for cuteness.
The problem is, none of us can think of an appropriate place in an existing customer to plant them; they're very easy to care for, but they ideally need to be in a small pot in a sunny spot.
Like my sitting room windowsill, where I now have a matching pair I bought for myself in pearlescent red bowls.