My DD just turned 3 and she has this habit (started when she was quite young) of going on her tummy, putting her hands just under her private parts, knees pointing out, bottom up (like a frog, IYSWIM), and doing a humping movement - she does this when she is tired and wanting to go to sleep. Sometimes she will put soft toy underneath her as well (her poor minnie mouse toy is typically the favoured one!) - when she was little, we just ignored it, figured she will outgrow it - but she hasn't and she started doing this in my sister in law's living room on Christmas afternoon as she was tired!! How should we react ? am still off the ignore school but my DH keeps telling her not to do that - but not sure if that's the right thing? sorry so long but it beggars belief when you see it!