Friends of mine recently started a family and on my question whether I can make anything for their little one they asked for a balloon wrapper. It takes up minimal space when stowed (aka w/o inflated balloon) and is nice and touchy once you put a lung full of air into it.
Best thing: it uses up all those scraps you still have lying around. In my case this was less than a quarter square meter of cloth in bits and tatters :)
Hmm, if we're generous, the volume is around 8l, the cloth weighs 38g, difference in density is 1kg/m3 between air and helium.
1000g\m3*0.008m3 = 8g lift VS 38g mass. This won't take off but that wasn't the intention here :)