I think edible decorations are a better idea. Plastic things are cute, but they will end up in the trash. For a bakery, that would be a lot of plastic* *oops misread it as you starting a bakery! Still fun ideas ahead:
Depending on what you need, there are nuts, fresh or dried fruits, shaved toppings like coconut, cookie cutter shapes of chocolate or cookies, colorful drizzles, chocolate chips, marshmallows, pretzels, crackers, graham crackers, swedish fish, any candy really**, real flowers and foliage, cocoa powder or other powder dusting, seeds like sunflower or poppy, jello, pudding, mousses (uhh, the yummy toppings pronounced moose), sprinkles. **I’ve seen a lot of unique candy I’ve never seen in a big store at, well, another big store lol. If you have a store with a giant bulk section where you scoop what you need, they could have some funky cool looking edible things to use :)
More work involved could be 3d molded chocolate shapes, cakepop art, baking a soft super thin cake as a blanket over (you can punch patterns into it, and you can decorate on top of that) ((cool: use dye to make it a conrasting color!)), carving/making edible stuff into flowers and other designs, making mini versions of the cake to put on top,
If I need to sprinkle sugar on my poppy seed breads, I like to use fat granular sugar and sprinkle it right out the oven so, along witb a little extra sweetness, the granules stick and don’t quite melt all the way so there’s this satisfying texture on the outside like the softest sandpaper. I’m sure other kinda chunky melty things could do cool stuff.