premise: I remember elaborate " hot air balloons " we built out of baskets and string for our Beanie babies and the yellow car we used to drive around the plastic castle in the backyard playing " Mcdonald 's . " I remember spending an entire week once living with my sister in a large refrigerator box that my dad brought us from work . We cut out holes for windows and loved that box to pieces . When my dad finally had to throw it away , we cried . Why did they build hot air balloons out of baskets and string ?
hypothesis: Because they used to play " McDonald 's " .