CHILD'S PLAY
Meaning of CHILD'S PLAY in English
n. ( colloq. )
easy task
1) ~ to (that's ~ to him)
2) ~ to + inf. (it was ~ to solve that riddle)
The Bbi combinatory dictionary of English, a guide to word combinations.
Комбинаторный словарь английского языка Bbi. Руководство по словосочетаниям.
2012