As a child I had a few chamelons and I really like them. They were a great pet since they were small and somewhat easy to take care of. I never got over their ability to change colors though.

Yes that is a big one the one that was shown first i think was the first type lizard i seen i think.

Geckos have the ability to change the colour of their skin, but they have not mastered it like chameleons. So, such Geckos aren't really "chameleon".