I can hear you all going 'yuk' and switching off! My dd is 4 1/2 and for the last 2 or 3 days she's had marks on the front of her pants, bad enough to be visible from the outside. There is no actual 'substance' to it, it's just a light brown wet mark. There seems to be a slight smell as well (I'm really cringing while I type this!). She says it's not itchy and it doesn't seem to be bothering her. She has a bath every other day and we've always used bubble bath although I know it's not recommended, but what's a bath without bubbles! Anyone had anything simular?