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Rice substitutes?

So, I'm planning on making bento boxes for my mom and I this year. I'm starting to plan and get ready now, but I ran into a problem, my mom asked if it's going to be rice every day. I told her no, but I'm not really sure what else I could use in the place of rice. I was thinking about quinoa, and noodles on occasion, but are there any other things I could use to replace rice every once in a while?
Thanks in advance :3