Composition_functions.js

// DumboParent.js
return (
      <Dumbo
        availableShoes={availableShoes}
        firstChild={clothing => <FirstChild clothing={clothing} lollipops={this.state.lollipops} />}
        secondChild={clothing => <SecondChild clothing={clothing} />}
      />
  )

// Dumbo.js
return (
  <div>
    {this.props.firstChild(this.state.firstChild)}
    {this.props.secondChild(this.state.secondChild)}
  </div>
);