The knife-maker claims the meteorite he found is made of steel. Steel is a man-made substance using iron and carbon. Metallic meteorites contain an iron-nickel alloy.
When Bowie arrives at the Veramendi residence and introduces himself, he says that he doesn't speak Spanish. All of Bowie's siblings learned how to read and write. In addition, he and his brother, Rezin, learned to read, write and speak Spanish and French.
The Bowie knife is shown being thrown and hitting its target. However, it was never intended to be thrown. It was what we call today a "combat knife."
When the girl is hitting the pinata she is blindfolded, but you can see clearly that she is following the pinata swing as she hits it.