All I remember is a boy accompunied buy a talking stuffed bear and a guy. The boy meets a blue fairy ( adult size ) and at the end he finds his mom, little brother and sister. The boy also played the main character in August Rush ( the young boy, musician )... I forgot his name.

Arthur and The Invisiables... or Finding Neverland

Also sounds a bit like AI (artificial intelligence.) but he never met with his bro or sis after