Most likely since bees pollinate flowers
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It would probably depend on how you make them (should look like something that's related to the themes SPRING or FLOWER). For example, if you make a bucket hat, it should have colors/elements that appear within the themes. So technically you can make hats related to fashion as long as they are somewhat tied to the themes or look like something that makes sense for a chosen theme. (ex. a BANDANA made of GRASS or a BUCKET HAT with a sun in the corner shining with a bright blue sky for it's design) These are just a few examples.