Kindergarten game (1-3)
I believe the answer is:
i-spy
'kindergarten game' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for i-spy that I've seen before include ". ... with my little eye (children's game)" , "Children's alphabet game" , "Child's guessing game" , "Children's guessing game" , "Wordgame" .)