"Ti sei fatto la bua?" http://www.treccani.it/vocabolario/bua/

Ti sei fatto bibi?

« The team says words that end in 'y' -- such as tummy, mummy and doggy -- or words that repeat sounds -- such as choo-choo and night-night -- could help infants identify words in speech. » quote from : https://www.sciencedaily.com/releases/2018/08/180801102605.htm