english: Could we get balloons the size of a house to stay up for more than 100 days, while costing less than five percent of what traditional, long-life balloons have cost to make?
non_english: Možemo li da postignemo da baloni veličine kuće lebde više od 100 dana, koštajući manje od pet procenata od cene izrade tradicionalnih, dugovečnih balona?