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Ideas for rounding corners on odd shapes?

So my kid has lost a bunch of these shapes and I'm going to make a replacement set.

Does anyone have any ideas for how to get a consistent roundover on the corners? I have a router table but no CNC.

The square and rectangle I could do with a roundover bit and the blocks on their sides. But I don't see any obvious solutions for the pentagon and triangle.

I'm totally fine just hand sanding these, but this kind of problem solving makes woodworking fun!

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  • Router and template! Use a band saw or jig saw or even a coping saw to cut out the shapes in MDF or something. Use a 1/2" drill bit as a template and draw on your rounded corners. And then sand or file or rasp them to shape. THEN use a flush trim router bit and go to town!

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