HELP! HELP!

there's no difference.

Made of wood.
Made from cardboard boxes and gaffer tape. (duct tape)
Made of sand.
Made from yesterday's leftovers.
Made of steel.
Made from scrap metal.

'Made of' is often used when the material the subject consists of doesn't change during the process of making the subject, e.g. this chair I am sitting on is made of wood. Here, wood is still wood. It doesn't transform into something else. The house is made of bricks. [They are still bricks.]

However, 'made from' is used when the material changed its nature, e.g. paper is made from wood - the wood disappeared — it was transformed into paper.

Also we can use 'made from' to denote a more subtle transformation:

My shed is made of wood (it is composed, mostly, of wood.)

My shed was made from old planks that I found. (It is a shed, not merely a pile of planks and nails.)

Wine is made from grapes. (Not made of grapes)
Butter and cheese are made from milk. (Not made of milk)
Beer is made from water, malt, hops and yeast. (not made of those things).

In short, 'made of' is usually about composition, and does not always imply a process carried out by people, and 'made from' is usually about manufacture, which does.

An idiot voted me down, too cowardly to explain why.

Thanks for your sharp information