Isaac Asimov & Eli Jayne 
Youth [EPUB ebook] 

Two youth have caged two strange creatures in the barn. While they scheme about joining the circus with their new “animals”, their fathers are waiting for two otherworldly travelers with whom they plan a trade deal for precious elements. The alien merchants are late and when the fathers learn the youth have been feeding some animals in the barn, they put two and tow together. They run towards the barn…