Answer the following question, with explanation first.
Why do children usually like jumping rope?\nOptions:\n- increased heart rate\n- smiling\n- sweating\n- having fun\n- jumping

having fun
Having fun is defined as having light-hearted pleasure, enjoyment or amusement.

Jumping rope is the activity, game or exercise in which a person must jump, bounce or skip repeatedly while a length of rope is swung over and under, both ends held in the hands of the jumper.

Children usually like jumping rope as they are having fun.

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So, the answer is having fun