Robos are very small and fast! And supposed to be quite entertaining to watch. They don't have a reputation for being the easiest to tame or handle but I'm sure they'd be a lovely addition to your hammily
. Just be prepared for needing four cages at some point! If you get another pair that is. At some point, one or both pairs may need to be separated if they fall out and fight. If you're thinking of getting them it's best to get a cage or tank all set up and ready first. Same idea as with the dwarf winter whites - no levels, 2 houses, wheels, water bottles and food bowls - all to avoid territorial behaviour. Sounds like you need two detolfs! One for each pair, then you can divide the detolf if you have to separate them.
I'd love to have a Robo.
Here's a couple of videos that might show you what to expect
https://www.youtube.com/watch?v=ghDqtt6RtFU
https://www.youtube.com/watch?v=f5ybvd8BQ30
You can see how active they are - they need lots of space to run around in, but also lots of hidey places and cover.