All that is left to do is start floating the objects.
This is done by holding the object under the magnets and slowly bringing it up. When It nears the point where it wants to float up, push the button. This will set the level to float at to the current height.
Next, hold it just below where you set the hold height, so the LED lights up. Hold it there until it simply floats out of your hand. This happens because the microcontroller slowly adjusts the hold height up, to where the electromagnets have enough power to control the object.
You may also notice some buzzing coming from the electromagnets. This can be easily fixed by inserting some padding around the electromagnets.
If you do make this I would love to see some photos. It would also be great to hear any comments you have.