Create a miniature garden with them. Hit the ends of the thorns with a tiny drop of white glue, and attach sequins. Sit in a tiny thrift store Santa and enjoy! good idea
they will be super happy on a enclosed balcony with no rain and just above freezing. I THINK that every opuntia that exists will be fine at freezing and dry. When i try to grow them in little pots inside the house they are puny but in big pots outside or in ground they will be impressive.
good idea 
