I have some quiltsmart interfacing pieces, Pinwheel Spin pattern, but there are no instructions. I want to use it for a baby quilt. If anyone has done this pattern, I would REALLY appreciate some info on how the pieces fit together. This is my first time on here.

Hi and welcome to QB. I've never used Quiltsmart but from looking at
their website it seems that you'd have to purchase their kit in order to get
the pattern and the instructions. By the way, I don't think the kit includes
fabric but I could be wrong.

This is what it says on the Quilt in a Day website:

Sew the interfacing to fabric by stitching on the solid printed line. Trim the piece on the dashed line, turn it right side out and finger press. Fuse the piece onto a background square and zigzag stitch in place. It's that easy!

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haven't used quiltsmart yet