I love going to those relatively new Frozen Yogurt places. The ones where you pay by weight. I love being in charge of my own toppings. I don't know if they're everywhere yet, but here's one example:
The far left is where you get the frozen yogurt. It comes out like soft serve. They all have three nozzles, so you can either get one individual flavor (nozzles on either side) or a twist of the two (the one in the middle). Then, in the case here, they have the toppings bar to the left of the register. You get however much you want, since it's all done by weight. I've seen the usual options of nuts and berries, to candies like Reese's and snickers, as well as brownie, cookie dough, and cheesecake bites. The one we went to in Ohio had all kinds of breakfast cereal and weird sort of jelly balls.