Child's game and Jump rope

Child's game noun - A game enjoyed by children.

Jump rope and child's game are semantically related. In some cases you can replace phrase "Jump rope" with "Child's game", this phrases are similar.

Jump rope noun - A child's game or a cardiopulmonary exercise in which the player jumps over a swinging rope.

Child's game and jump rope are semantically related. You can use "Child's game" instead a noun phrase "Jump rope".