Take a look at this thread:
Some of us have posted pictures of our Emo play spaces. MarioMart has a nice setup of black borders with raised edges.
I used a light coloured shelf board, taped the edges off and painted them black. No raised edges on mine yet but Emo stays away from the edges as long as he isn’t dancing.
It’s important to keep in mind Emo’s fall sensors are off when dancing. Emo will dance right off a play space.