NES stack-up blocks compatibility?

[geozeldadude]

a set of blocks is on my list of video games to get. it seems japanese sets are more common. other than the color differences, is there anything about the hands and blocks themselves that wouldn't be compatible with the US R.O.B.?

[Hobie-wan]

Unless something was changed to conform to US choking hazard specifications I wouldn't think so. But I don't own a ROB, so don't quote me on that.

[fastbilly1]

My understanding is that the blocks are the same - I was looking into a Japanese set myself.

[Hatta]

Where do you get those? Do they come in sets or individually? I'm missing two to have a CIB Stack Up.