Hi Everyone-

I'm planning to make a sewer scene for a ninja turtle cake for my son's fifth birthday.  I'd love to add some ooze" coming through the drain pipe, but I'm not sure what I can use to make it realistic looking.

Thanks in advance for your help and suggestions.

Piping gel colored green

I've done "mutagen" before!! (ninja turtle ooze) I used corn syrup thickened with a little powdered sugar, then added green food coloring. Making it thicker kept it from spreading out so much (like my volcano lava did the first time I made it). 

*I was just corrected by my 6 year old - in the new cartoons the ooze is blue... Lol