K.P.
M., I have an 11 year old that came to live with us when she was 8 and did this same kind of thing. However, the techniques we used would not work with an 18 month old and so I did a net search in hopes of finding an answer that would help you. The following page tells about this very thing. http://www.raisingkids.co.uk/1_4/TOD_emo11.ASP
Hope this helps.