Answer: B Adults can learns from the way children experience joy.
Explanation: As you can see in the poem, an adult is seeing the way a child experience great joy and happiness getting toys and playing with them. And in this poem, the adult is the one speaking and says, "When I bring to you colored toys, my child, I understand why there is such a play of colors on clouds, on water, and why flowers are painted in tints when I give colored toys to you, my child." The adult is saying how he/she sees how much toys can make children happy.