Visitors to Japan are often delighted by the incredible variety of candies. One that is unique to Japan helps children learn by making their own sweets. With no artificial colorings or preservatives, they are perfectly safe to eat. The first candy in this range, launched about 30 years ago, fascinated children by the way it changed colors when mixed, giving them a hands-on experience of the chemical reactions they were learning about in school. Recent research proves that playing with these products have a positive educational effect, such as boosting concentration.