Just as a clarification--pygmy chameleons of the genera Rhampholeon (most commonly available) and Brookesia are both also called pygmy leaf chameleons due to the fact they mimic dead leaves. They are primarily terrestrial, lacking the prehensile tails that enable the more familiar chameleon species to climb easily, and generally do not exceed 3" in total size. They, unlike other chameleons, will thrive in glass aquaria of the appropriate size and setup, a ten gallon would be fine for one or two as long as some basic needs are met. They like densely planted terrariums with lots of cover, dead leaves or leaf litter of some kind on top of the substrate, and moderate temperature and humidity. The downside to these chameleons is that they are primarily wild caught and therefore prone to parasite problems and naturally have a short lifespan, 1-2 years being the average. They do make an interesting display animal but be aware that they are different (and have very different care requirements) than the average chameleon.