It could be a baloon or giant beach ball or excersize ball, saran wrap then tape, then you cut it in half or only as far apart as you have to, get it apart and tape it back together. Or in Allens case stick a baby in there and tape it back up. Who just happened to have an egg and a baby at a moments notice.
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.