ﺔﻳﻭﺎﻌﻣ ﺓﺮﻌﺷ (Rolling Ball)
.ﺓﺮﻴﻐﺼﻟﺍ ﺓﺮﻜﻟﺍ ﺓﺪﻋﺎﺴﻤﻟ ﺔﻋﺍﺮﺒﻟﺍﻭ ﻖﻄﻨﻤﻟﺍ ﻰﻟﺇ ﺝﺎﺘﺤﺘﺳ ، Rolling Ball .ﺎﻬﻟ ﺎًﻘﻟﺰﻣ ﻞﻜﺸﺗ ﻰﺘﺣ ﺎﻬﻧﺎﻜﻣ ﻲﻓ ﺓﺮﻜﻟﺍ ﻰﻘﺒﺘﺳ .ﻱﺮﺋﺍﺩ ﺐﻘﺛ - ﺔﻳﺎﻬﻨﻟﺍ ﺔﻄﻘﻧ ﻰﻟﺇ ﻱﺩﺆﻳ ﺐﻠﺻ ﺭﺎﺴﻣ ﻰﻠﻋ ﻞﺼﺤﺗ ﺔﻘﻳﺮﻄﺑ ﻁﻼﺒﻟ .ﺰﻐﻠﻟﺍ ﻊﻄﻗ ﻊﻣ ﺪﻳﺪﺟ ﻁﻼﺑ ، ﺔﻴﻓﺎﺿﺇ ﺕﺎﺑﻮﻌﺻ ﺐﻠﺠﻳ ﻯﻮﺘﺴﻣ ﻞﻛ .ﺕﺍﺮﺴﻜﻤﻟﺍ ﻞﺜﻣ ﺯﺎﻐﻟﻷﺍ ﻕﻮﻓ ﺮﻘﻨﻟﺍﻭ ، Rolling Ball ﺔﺒﻌﻟ ﺕﺎﻳﻮﺘﺴﻣ ﺮﺒﻋ