Ever saw a birth scene in a film or on TV and though "Gosh that baby looks old" well that's because babies have to be at least 15 days of age before they are allowed to 'work'. Ever wondered what the gunk is they put on the babies after a birth scene? Apparently it can be anything from 'Grape Jelly' to 'Cottage Cheese'. Grim. To find out more, give the below article a read... It's quite an interesting part of filming you don't often hear about.