This instructable takes a real carved pumpkin and turns it into a glow in the dark ring.
Take a small pumpkin and carve it to suit your taste.
Scan the pumpkin into a 3d file.
Create a ring using 123D or other software and export to TinkerCad. Import the carved pumpkin file into TinkerCad and join the two files.
Scale to 40% (for small fingers) or a larger percentage for larger fingers.
Print on a 3d printer using glow in the dark filament.
The ring file is available at: