Fixed spelling error in docs/manual/introduction.

docs/manual/introduction/Creating-a-scene.html

@@ -72,7 +72,7 @@
 
 		<div>To create a cube, we need a <strong>CubeGeometry</strong>. This is an object that contains all the points (<strong>vertices</strong>) and fill (<strong>faces</strong>) of the cube. We'll explore this more in the future.</div>
 
-		<div>In addition to the geometry, we need a material to color it. Three.js comes with several materials, but we'll stick to the <strong>MeshBasicMateria</strong> for now. All materials take an object of properties which will be applied to them. To keep things very simple, we only supply a color attribute of <strong>0x00ff00</strong>, which is green. This works the same way that colors work in CSS or Photoshop (<strong>hex colors</strong>).</div>
+		<div>In addition to the geometry, we need a material to color it. Three.js comes with several materials, but we'll stick to the <strong>MeshBasicMaterial</strong> for now. All materials take an object of properties which will be applied to them. To keep things very simple, we only supply a color attribute of <strong>0x00ff00</strong>, which is green. This works the same way that colors work in CSS or Photoshop (<strong>hex colors</strong>).</div>
 
 		<div>The third thing we need is a <strong>Mesh</strong>. A mesh is an object that takes a geometry, and applies a material to it, which we then can insert to our scene, and move freely around.</div>