child's game, n.
a game enjoyed by children
<noun.act>
child's game
semantic pointers
hypernym
hyponym
blindman's bluff, blindman's buff
cat and mouse, cat and rat
cat's cradle
hide-and-seek, hide and go seek
hopscotch
jacks, jackstones, knucklebones
jackstraws, spillikins
jump rope
leapfrog
marbles
mumblety-peg, mumble-the-peg
musical chairs, going to Jerusalem
peekaboo, bopeep
pillow fight
post office
spin the bottle
spin the plate, spin the platter
tag
tiddlywinks