Luffa, by Byron Tumlinson

I think 5 to 10 seeds will be plenty to get anyone started.  They grow really well, and make plenty of seeds.  You may tell each one that you can eat luffa just like any other squash if they are picked young.  If they want to use them as sponges like I do, just let them turn yellow on the vine.  After picking them, peel the skin off.  The skin comes off really easy, like peeling an orange.  After peeling, cut off each end and shake out the seeds, then put them in a mild bleach solution to whiten them.  They get really soft but are great for bathing or scrubbing dishes etc.  If they get a little dirty looking from use, just bleach them again, and they are just as good as new.  I have one we use for a bath sponge that is over 20 years old.