Hot Balloon 2

This time, our whole class failed again as none of them succeed to fly in the air. So our teacher again ordered students into new groups. My new group came up with a new idea and design. We used a really light plastic bag and four small birthday candles to make the hot balloon. We used a small paper to hold candles as the base, and connected bags with base using strings. 

However, we still failed, as we expected... Because we didn't have time to make the bag and base a close system, which means that we won't have enough hot air in the bag to make it fly.But none of the group succeed, so... whatever.
But this is actually an amazing experience, and personally, I really enjoyed it.