Stressfree

1   weight 6 ping pongs with another 6 ping pongs. see which side is heavierTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。3 H2 t: `* B4 C! d) `5 \. H' t! P; C
2   spilt the heavier side ping pongs in half and weight against each otherTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。. m2 G, G8 q3 Z# l  t$ s4 [) s
3   weiht either ping pongs one on one then you will know which is the heavy one.