they're very smart, we had these; need a drink mommy, so I put sippy of water in bed and she quickly learn't to call for "more water", then need a poo, need a wee (she still in nappy at night and never poos in night!) another cuddle mummy, another kiss mummy, need medicine, more rubby (vapour rub, she gets hooked on stuff when she has a cold) more nummy (teething gel) the list goes on and on and the older they get the better the demands get, now I get "want to talk mummy, need to talk to you!"