Preteen

['priː'tiːn]

(noun.) a preadolescent boy or girl (usually between 9 and 12 years of age); 'little league is intended for the preteens'.

(adj.) of or relating to or designed for children between the ages of 9 and 12; 'a preteen party'; 'preteen clothing' .

埃塞雷德编辑--From WordNet