Rowntree's Fruit Gums were round fruit-flavoured sweets, like very hard jelly and they needed a lot of chewing. One side was flat, the other side had bumps on it.
Fruit gums feature in one of my earliest memories. It was Christmas, the year I was four, so it would have been Christmas 1970. Among my gifts were a doll's house and a tube of fruit gums. I can remember picking out all the purple fruit gums and lining them up along the edge of the upper floor of the dolls house. I can't imagine now why I was doing it, but it remains one of my most vivid early memories.