They look a bit like sweets. To me, anyway. It's not that clear in the photo but they're strung on two colours of tigertail, blue and black. Here's a similar one with purple and pink where you can see the colours. The bumpy ones make me think of the everlasting gobstoppers in Charlie and the Chocolate Factory (yes, the 1971 film, in which they for some reason made the gobstoppers which you suck forever in a shape which would be most uncomfortable to suck).