I participated last year. I didn't have a problem. I wrote "beads" instead of "seeds" on the envelope and it went through just fine :) I figure, if they figure it out, they'll just confiscate the seeds which would be unfortunate but not the end of the world :)

Martha, definitely join in! We've had several Canadians participate. And writing beads instead of seeds is sooo much easier, trust me. We haven't had any problems so far and we've had friends from all over the globe join in so far.

Tracy