That's a Jade (Crassula ovata) bonsai. The opuntia is not the prettiest, but I like it...wish I could come get it. I have to visit PA every year for my husband's family from Florida, and I'm always frozen and miserable.
Planto, I have never seen the moon cactus bloom! I don't like those...they are a dime a dozen but that is a pretty cool sight. Thanks for sharing!