Krystal Continues her investigation into the effect of double-stuffing balloons, which means to stuff one inside the other and then inflate the inner one. She makes a superb effort to do this without a check valve, reaching nearly full size (both the balloon and her cheeks!) before having to let go. She wastes no time trying again, after having added a check valve to her mouthpiece.

Krystal Continues her investigation into the effect of double-stuffing balloons, which means to stuff one inside the other and then inflate the inner one. She makes a superb effort to do this without a check valve, reaching nearly full size (both the balloon and her cheeks!) before having to let go. She wastes no time trying again, after having added a check valve to her mouthpiece.