My 20 month old is a brilliant talker, she can count and knows colours and is generally a sweeet natured girl, however my husband and i are becoming increasingly concerned that her motor skills are way behind normal, She is unable to hold her spoon correctly to feed herself, can't put puzzle pieces in the right slot, she shows no interest in trying to scoot along on toy cars. wants to be carried down stairs and put on things rather than doing it herself, is she just lazy or could there be a problem?