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State Machines are Child’s Play Observing children ages 9 to 11 playing Escape Machine
    ACM SIGCHI Interaction Design for Children (IDC) 2009
    We developed Escape Machine, a puzzle game in which children control the behavior of characters in a maze by manipulating a tangible state machine built with Posey, our computationally-enhanced hub-and-strut construction kit. We observed children ages nine to eleven playing the game in several sessions. The qualitative results of this observation validate the promise of Posey and Escape Machine to engage children in manipulating algorithmic specifications for behavior.