Chameleons are good for that. Since handling them isnt really kosher (due to delicateness) dont get one if you want something that can be handled. Feeding them is fun too, my buddy had a 3 horned big chameleon (last time i saw it it was 12 inches from nose to start of tail) it may be a jacksons, we would dump a bunch of crickets and superworms and the thing wouldnt even move from whereever it was, just turn towards the food bowl and start slinging that giant tounge. Really wild to watch, and he would change backgrounds and substrate hue to make him change color
Or a small specie of monitor lizard. They are super intelligent and act like dogs essentially. My Buddy's would recognize its name, and come out and see what's going on. He would leave the lid open, and he got him (somehow, don't really remember his methods) to the point where he wouldn't leave the cage w/o being called. It was awesome
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hmm interesting, I'll look into that thanks!