Bubber feels light as air and fluffy as a cloud. It"s so light that it actually floats on water. Discover the joy of carving in a soft compound that leaves clean, sharp lines and amazing imprints. Bubber is non toxic, leaves no stain or residue and never dries out, so you can play with it over and over. Whether building a tall skyscraper, a broad mountain range or creating anything else that you can dream of, you are limited only by your own imagination in the world of Bubber fun. 15 oz of Bubber comes in a heavy duty reuseable box which works perfectly for storage and easy transportation.