cartoon of a boy jumping rope from http://www.usda.gov/cnpp/KidsPyra/ National Agricultural Library, Agricultural Research Service, U. S. Department of Agriculture
跳繩
activity、Alphabet Word Images、boy、cartoon、child、exercise、initial J、jump rope、moving math、play、Set 2A、usda、Verbs
活動、字母詞圖像、男孩、動畫片、兒童、行使、初始J、跳繩、移動數學、玩、設置2A、USDA、動詞
資料來源：openclipart ( https://openclipart.org/ )