OK, Marina, you get those for Roki and let us know how they work!! I don't have wood floors, so I don't think they would do well here. It reminds me of the one-room country school I attended when I was in grade school. There were wood floors and occasionally the teacher would throw out some sawdust-like material (from a barrel) that had a reddish oil of some sort in it. The students would get to slide all over the floor on it, working the oil into the floor. There was a name for that stuff, but it escapes me now. I can still remember how it smelled though and how much fun it was to slip and slide all over the floor with it.
I was just noticing your avatar photo. Is that taken near where you live or where you live? It looks so interesting with all the rock work.
Linda, Augie & Finn's Mom