Steel Wool Fireworks, Blow Card off Spool, Firefly Trickery, Chewing String Together, Fingerprint Find, Mt. St. Helens Erupts, Logo Program, Hydraulics. Leila is surprised to see steel wool burning. Mr. Wizard has arranged things to show her that oxidation, the combining of a material with oxygen, can take place even with things that normally you think won't burn.