Ya.. they very expensive.. at least oso need 4 digits.. 1 of my neighbours they hv 1.. n it very clever n playful but less frenly  :blush:  always heard tat auntie said how clever it is.. it know who is who eg brother is the auntie's son n sister is the auntie's daughter.. when the auntie said "call kao kao (brother) wake up" he wil ran to the room n wake the auntie's son..  :clap:  :thumbs: