Good morning @chenee, bummer the seeds didn't work, they aren't cheap to buy. Maybe try buying a small cactus, then take slips of the roots and put them in water to root, then plant them in dirt. Remember once rooted in soil, do not over water them.
Thanks for dropping by good luck with growing.
Good afternoon @farm-mom, thank you for the information and I will tell my husband about what you have said.