Rob wants to know what's a good beginner 3D printer. Leo says that 3D printers are a hobbyist's delight, but they have to be kind of geeky. 3D printers are in the early days of technology, and they require a lot of attention and calibration. And Rob will have as many failures as successes. They are also expensive for a really good one. They are also not very fast, usually taking a few hours to a few days to get a print don
But Monoprice has one for around $200. That's a good place to start.
To get started though, it may be a good idea to get involved with a local Makers Space and use their 3D printers. That way she can try the hobby out without spending a lot of money. Usually just a cost of materials and a small lab fee. A local community college will also have a makers space.
Here's a list of some cool cookie cutter 3d prints - https://all3dp.com/2/3d-printed-cookie-cutters-10-great-curated-models-to-3d-print/