で・から (made of, made from)
(made) of, out of; from
Material + で + 作る / できている · Raw material + から + 作る
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で marks what something is made of, when you can still see the material: この机は木で作りました, "I made this desk out of wood"; 紙で飛行機を作る, "make a plane out of paper".
から is used when the raw material changes completely and can't be seen in the product: ワインはぶどうから作ります, "wine is made from grapes"; 紙は木から作る.
The thing being made takes を: 紙で飛行機を作る.
できている means "is made of": このかばんは革でできています, "this bag is made of leather".
A handy test: if you can point to the material in the finished thing (the wood in a desk, the paper in a plane), use で. If it has turned into something else entirely (grapes into wine), use から.
Examples
この机は木で作りました。
I made this desk out of wood.
紙で飛行機を作りましょう。
Let's make a paper plane.
このかばんは革でできています。
This bag is made of leather.
雪で大きな家を作った。
We built a big house out of snow.
ワインはぶどうから作ります。
Wine is made from grapes.