Most of these lizards don't become very big, but there is a large divergence in their sizes. The smallest gecko at just under an inch is the Jaragua Sphaero. It is also the smallest reptile in world. The largest one ever found is extinct now. It was Delcourt's Giant Gecko of New Zealand, and it was just over 23 inches long.
Your very first consideration should be your ability to own and raise a complicated animal for a pet. If you think you can't handle owning one, then it would be best not to, but if you are insistent, then get those that are more manageable and will not give you too much trouble.
Provide UV light. The light should imitate the one given off by the sun as this helps in your baby dragon's digestion. Working in a way much like photosynthesis, UV light encourages healthy digestion in your dragon. This is especially important for baby dragons as they are always in danger of indigestion due to your young age and reduced capacity to absorb food in large sizes. It is recommended to use paper towels as your baby dragon's substrate. Its is clean, easy to replace when dirty, and inedible.
Chameleon - Chameleons are cool. There isn't much else to say, but they're also quite difficult to keep. They need special requirements and can get very sick if they're not properly cared for. Leave this to the more experienced reptile owners. Bearded dragon - the most popular lizard kept as a pet, and for good reason. This is the best choice for a child. Anole - See above. Good for space, but children must see it as more of a "fish" and not a pet they can really interact with.
Just like many lizards, geckos can drop their tails as a defense mechanism. That is widely known, but what is not so known is that the Crested Gecko cannot grow its tail back. For the others, the tails the regenerate do not look the same as the one they lost. It will have duller colors and markings, and it will be shorter and stubbier. It may even be malformed. One more interesting tidbit here: They store fat in their tails to get them through lean times. It holds fat, and also nutrition, so it's not just a source of energy.
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