My youngest stepdaughter is 1 3/4 years old, and for a while she has developed a habit of removing her nappy while she is in bed and then painting herself, the inside of her cot, the bedding, the walls with its contents. We've tried to start potty training but she hasn't quite got the comprehension for it just yet, we have tried putting her nappies on backwards to make it more difficult, even sending her to bed with leggings on to make it more difficult and all it seems to do is slow her down, we are more than willing to take suggestions?