As a dry wind blew on Saturday morning in the Kandank Jurank Doank park and nature school in Ciputat, South Tangerang, the wheels of pushbikes could be heard rolling on the pavement while children squealed gleefully. Some toddlers clung to their parents. Some cavorted in the playground while others played with their friends.  Participants in the Back to Nature: Pop-Up D’Jungle Race, a pushbike race held by a bike producer, pushed their bikes along, some faster than others.  Pushbikes, which do not have pedals like regular bicycles, are said to help develop children’s balance and motor skills. Approximately 100 children between 2 and 5 years old participated in the race. They were divided into several categories by age, each year in a different race.  Windi Ayu Diningsari, 28, a representative of the event’s organizing committee, said this w...