Replacement for pop rocks? I'm a big Heston Blumenthal fan and I'd like to try one of his recipes, which requires pop rocks. The problem is that I live in Brazil and nobody seems to have heard about pop rocks and I really don't know where to get it. Any suggestions for a replacement?
The method to make them is patented, and involves highly pressurized C02. Doubtful, you'd be able to find a replacement product. Online store maybe? shrug

However, you could try making a cheap home-made subsitute. Don't think it'd be an exact duplicate, might suffice for your purposes?