Nickelodeon NSI Gak Goo Green Gak is back Gak is the incredible, squishable, squeezeable, squashable, stretchable, bounceable, ploppable, poppable stuff Once you pick it up, you won't want to put it down Container lets you make all sorts of wacky sounds when you squish Gak around Smoosh it, twist it, bubble it and mix it For boys and girls ages 5 - 10