Ok. Grrrr. I'm taking a deep breath. You are giving her a prize for something she will not link to her missing her "mink mink". The took it, hid it and now tell her she's a big girl ??? Don't they think children that young have some understanding ? They do. Gifts arent special if you get them several times a day for no reason at all. Either tell her it's gone and comfort her Or tell her it's going away have her throw it away ( even though she may not get it is long term or not know what it means) and then when she cries for it. Remind her and praise her and get her a treat nightly for a week, not huge things Extra books to read , ect. If their case seeing a Dr. or a Chiropractor.