Specifically, the craze involves DIY candy, most of which the consumer mixes a specific amount of water with different "candy powders" and voila! You just made your own candy! Its pretty hard to explain in words but you can easily find out what I mean by youtube searching "popin cookin" and "kracie", the two companies dominating the DIY candy market.
So the local retailer of Japanese candy, Candy Play Singapore, generously held a sale on their second anniversary and I managed to get a few kracie sets for a low price. I got the neruneru set and basically its just magic sticky candy.
I first added the powder labelled "1" and added a little water(A tiny piece of container was provided to measure out the water) and mixed it. First it was a dull purple. Then I added the powder labelled "2" and mixed it. The mixture slowly became stickier and stickier and the colour actually became a pastel pink! This was the strawberry flavoured sticky candy. I did the same for the next two packets of powder provided and got the yellow sticky candy.
But theres more! If you mix the two sticky candies, you get a whole new flavour. A pack of sprinkles were also provided to sprinkle on top of the sticky candy.
Time for the taste test! The pink candy was strawberry soda flavoured. Indeed, when you eat it, its sort of has tiny air pockets in it that gives a "fizzy" feel. Same with the yellow one, which is yes, lemon flavoured. They both have a really tangy taste to them. And.. the flavour derived from mixing both is...Cola! (last picture) Pretty cool right?
I apologize if this post has been a little confusing. Its quite hard to explain with words and its easier if you watch a video, or even experience it yourself! These don't come cheap usually though. Each pack can cost $6-$14 in Singapore due to the shipping fees.
However, (Im not paid to do this! Just an objective recommendation) it is good to get from Candy Play Singapore as I believe they are the most relevant and they do try to keep their prices reasonable. They are also really nice people! So google them and check out their website if you wish to get some Japanese Candy to try out.
OH WAIT. But if you do not live in Singapore, websites such as napa japan stocks them too!
I will leave you with a video that I did in the past with "Gummyland" a popin cookin set. And while you're at that, check out my channel!