You are right, Winenous. "Gjør'n vel" is a tag question to the first sentence, so the two sentences must be read together. "Gjør den?" means "Does it?", and "vel" doesn't really add any meaning. It is sometimes difficult for Norwegians to find the right English translation of a tag question, but anyway, the point is that A first says that the thing doesn't look like a toy, and he then wants his companion to confirm it.