use text instead of obsolete kid property

index.html

@@ -23,7 +23,7 @@
 				event.preventDefault();
 				output.textContent = input.value ? ' Text: ' + input.value : '';
 			},
-			kids: [ input, { el: 'button', kid: 'Go' } ]
+			kids: [ input, { el: 'button', text: 'Go' } ]
 		},
 		output
 	]));