Make an anti-gravity static powered floating orb
Think atomic theory is only for nerds? Think again. Make magical electrons dance right before your very eyes. This anti-gravity orb will move at your command.
All you need is a magic wand (for the Muggles of the world, buy PVC pipe) and some leftover Christmas tinsel. No tinsel hiding in your junk drawer? Science Bob's got you covered.
The science behind the orb's flight is as simple as static electricity. Rubbing the PVC in your hair will give the pipe a negative charge. Zapping the tinsel will pass on the charge. The strung together tinsel will repel each other and transform into an orb. The (-) charged pipe then repels the (-) charged orb.
And you, in turn, will do nothing but attract (+) attention with your newfound invisible powers.
Holy Hogwarts, Voldemort. DIY wizardry has never been so accessible!