00660nam a2200169 a 450000500170000000800410001702000180005805000230007610000200009924500920011926000480021130000100025944000170026950000190028652001730030565000120047820140412111325.0000829s19uu    xx            00    eng d  a1-85697-412-X  aREF 030bW872 1999  aTaylor, Barbara  aI wonder why Zips have teeth :band other questions about inventions /cBarbara Taylor.  aDanbury, Connecticut :bGrolier Inc,c1999.  a32 p.  aI wonder why  aIncludes index  aI Wonder Why Zips Have Teeth is jam-packed with fascinating facts about inventions, from 'When did home computer games appear?' to 'What did people use before fridges?'  aHistory