Summary

I made some small changes to original model to improve printability for resin printers and scaled it down to around 1 inch long. I have printed over 1000 of these to be handed out at education outreach events and they have been quite popular so far!

I am also including a pre-supported model. Note that your mileage with this support setup will strongly depend on your resin, printer, and slicer. I would usually just recommend generating your own supports.