We had no idea our new physics-inspired Circle of Time puzzle would be so darn popular, and we've already run out of the first batch we cut.
We're cutting a much larger batch now, and should get them back in-stock in about 2 weeks.
This one does have a fun irregular edge - we'll keep the edge a secret til mid-summer, but eventually show it as part of the product image for those of you who want to know what you're getting before you buy.