A week or so ago, I took my daughter -- who is two-and-a-half -- to the FLGS. Without prompting, she picked out this percentile ten-sider. I didn't intend to buy it for her, but she carried around and wouldn't put it down, so I took it as a sign.
She calls it her "Rollin' Ball." I think that bodes well for a dad who learned to play RPGs on d10 games like Marvel Super Heroes!