A resin suncatcher is a wood frame with open channels, filled with tinted epoxy and hung where the light comes through it. This build follows Crafting in the Rain, who cut a rainbow blank on her laser, sealed it with gold spray paint and poured alcohol ink resin into every gap. Lit from behind, it reads like stained glass.
You do not need a laser. Pre-cut wood suncatcher blanks sell for a few dollars, and a scroll saw will get one out of quarter inch birch plywood in an afternoon. Past the blank there is no machine in this project at all. The two numbers that decide whether it works are the mix and the cure: 1.5 oz of part A with 1.5 oz of part B, stirred at least two minutes until the cloudiness runs clear, then three full days sitting flat. If you have not poured two-part epoxy before, how to mix epoxy resin covers the mixing on its own.
One thing worth knowing before you buy a resin: tabletop and bar-top epoxy ambers in direct sunlight. That is the resin class used here, and it is the fastest of the lot to yellow, which matters for something you hang in a window on purpose. For a south or west facing window, buy a resin sold as UV resistant or outdoor grade. In a north window, or on a piece you are happy to remake in a year, tabletop epoxy holds its color long enough.
For the color work, adding color to resin goes through inks against pigments and how much of each to use. If a wood frame is more than you want to take on, using resin molds is the pour-and-demold route to a similar piece, and how to make a suncatcher covers the versions with no resin in them at all.