Uranium Ore
You’d be surprised how much the market for radioactive products is booming online, and among a wide audience of people. Many start with this product: a radioactive Uranium Ore sample. Containing naturally occurring radioactive materials the product is great for testing Geiger counters and ‘performing nuclear experiments’. According to user reviews, you can use this to get back to the future (if you have a DeLorean on hand), or bundle with four turtles and a rat for the ultimate in ninja house defence.