i saw them on sale at a good price at ac moore but have no clue what to use them for....
You use them to stamp embossed images. You need embossing ink pads first and then you stamp the image, sprinkle with the powder and use a heat gun (or other heat source) to emboss the image.
I use them alot, but I would recommend a heat gun (sort of like a super hot hairdryer) you can get them fairly cheap at craft stores. I used to hold the sheet over a stove burner but it ended up curling the paper (not so nice looking)
I used to use a clothes iron to heat mine
a clothes iron? What a cool idea!
I got my embossing gun for about $12 at AC Moore on sale. And I took advantage of the current sale to buy a new bottle this weekend. I only have three so far though.