How to make a mess using green Trash Pack slime and a Cookie Monster Count N Crunch 123 educational toy. This Sesame Street toy has featured in a number of videos, but when The Uggleys naughty puppet dog went crazy and fed on The Trash Pack slime Cookie Monster started to eat green slime as well. \rbr\rbrCookie Monster still says Me Want Cookie Please but his mouth is all slimed up. My son learned a valuable lesson about what Cookie Monster can and cant eat. Cookie Monster is allergic to peanut butter cookies and green ooze.