Build: butterfly kite, out of my league

I bit off more than I could chew. I tried to make a butterfly kite from these instructions. I have lots of bamboo and it looked simple enough. I used a candle to heat, then bend the bamboo to form the wings.

Everything looked great, until I covered it with tissue paper. It's not symmetrical, but worse, there isn't enough surface area on the sails. This one doesn't fly. I'll try again after I master some easier plans.