A small group of children are making a river with water and sand and floating boats down the river. How is their cognitive development supported by this play?

a. Children use the muscles in their hands and arms to scoop sand and dig a pathway for the boats to travel down.
b. Children cooperate and negotiate which way to direct the path of the water.
c. Children proudly show their river to teachers and parents.
d. Children solve the problem of directing the water at the right speed and force so water is not absorbed into the sand before it reaches the end of the river.


d

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