Original: Struggling in school but gifted in farm labor , Naismith spent his days outside playing catch , hide-and-seek , or duck on a rock , a medieval game in which a person guards a large drake stone from opposing players , who try to knock it down by throwing smaller stones at it .
Simplified: He usually spent his days outside playing catch , hide and seek , or duck on a rock . This is old game in which a person guards a large stone from other players , who try to knock it down by throwing smaller stones at it .