ecmascript:

function initialize() 
{
    // Create nodes directly in the parent scene
    shape = Browser.currentScene.createNode('Shape');
    box = Browser.currentScene.createNode('Box');
    shape.geometry = box;
    Browser.currentScene.RootNodes[0] = shape;

    // Create children using the createX3DFromString service
    vrmlCmd = 'PROFILE Interchange  Shape { geometry Sphere{} }'
    tmpScene = Browser.createX3DFromString(vrmlCmd);
    nodes = tmpScene.rootNodes;

    // Nodes must be removed before adding to another scene
    for(i=0; i < nodes.length; i++) {
        tmpScene.removeRootNode(nodes[i]);
    }

    children = nodes;
}