Amy: Here are two sites from Delaware that have great instructions for constructing bow tie blocks. One is the 3D kind of which I've done a lap quilt. and the other one is the traditional block. Hope this helps.
http://delawarequilts.com/BOMs/3DimensionalBowTie.html
http://delawarequilts.com/BOMs/Bowties.html
Have fun :mrgreen: