If the tank is not filling all the way (there should be a fill line on the inside of the tank), carefully bend the bulb of the float valve up a bit and see if the tank will fill.
如果水箱没有充满正常水量(水箱内侧应该有一条水位线)，慢慢地弯曲一下浮囊阀，看水位会不会上升。
2
Take clear vases or bottles, fill them with water, add holiday-colored food coloring--a few drops will do--and float candles in them!
取几只透明的花瓶或杯子，往里面倒点水，再加些节日用的食用色素（几滴就够），然后再在杯中放块漂蜡。
3
They would fill a spherical weather balloon, available online, with helium and float the entire cooler-camera-cell-phone apparatus high into the atmosphere.