What does uncle marcos make from the materials he brings back in "enormous boxes"?

From the text:

When the crates were opened, they were found to contain loose bits of wood, metal, and painted cloth. Marcos spent two weeks assembling the contents according to an instruction manual written in English, which he was able to decipher thanks to his invincible imagination and a small dictionary. When the job was finished, it turned out to be a bird of prehistoric dimensions, with the face of a furious eagle, wings that moved, and a propeller on its back. It caused an uproar.

Did uncle macros inspire anyone else to create an invention that flies?

What specail power does Clara have that Marcos pretends to possess?

What specail power does Clara have that Marcos pretends to possess?