I ran across this a long time ago at a convenient store, they had a line of selection of gag toys to play pranks. One of them included a small bag with a tank on it and when you crush it it builds up foam and explodes. I can't seem to find it there was also another one including a foam effect tasted like baking soda and vinegar but was in pill form. Does any one know the names of these gag toys or where I can find them