Miguel's usually pretty careful. He doesn't have that inner-voice Tulio was talking about, maybe, but he's not a complete idiot. So he smelled and tasted the candy before he actually ate any. He's almost completely certain it was not poisonous.

Plus it tastes really good. And it makes everything purple, like at the feast in El Dorado. He likes it. So he's busy gathering more when he wanders into the GREAT BIG METAL GUY and has to stop and stare.

"Wooooow. What're you?" The candy in his hands gets dumped into his pants and now Miguel's decided to start tugging on the metal man's arm, grinning gleefully.