Furikake is condiment to sprinkle over rice, or mix in rice when making rice balls. When people get tired of plain white rice and want to add some flavoring, furikake comes in handy. Parents often sprinkle frikake on rice to encourage children to eat rice.
Most commercial ones are dry for long shelf life in room temperature, but a half-dry type is also available. It comes in many different flavors, and the ingredients vary from katsuobushi, kombu, wakame, nori, umeboshi, jako, sesame seeds among others.
Furikake can be found at Japanese, Chinese, and Korean grocery stores. If you wish to order online, here are some of the links;