?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Simon&rft.au=Simon%2C+Shirley&rft.aufirst=Shirley&rft.atitle=Puppets+Promoting+Engagement+and+Talk+in+Science&rft.volume=30&rft.date=July+2008&rft.issue=9&rft.pages=1229-1248&rft.issn=0950-0693&rft.title=International+Journal+of+Science+Education&rft.genre=article