I spent 4 hours last night making amiibo coins. Here are the links to the materials I used for the project.
I used a pair of scissors to cut the specific coins I wanted out of the sheets in order to hole punch them, but I’m not going to link a pair of scissors for sake of simplicity.
Here are the tags I am using...
I'd get the figures for their looks, and bragging rights. In my case I wouldn't buy them for the NFC features, I would buy a pack of about 12 NFC tags for $8 and write the data of all the figures, unless you are a stickler for authenticity. Edit: If interested heres the link to the NTAG you would need to use (NTAG215) cheapest I could find so far. https://www.amazon.com/Stickers-TimesKey-Nintendo-Programmable-Devices-10pcs/dp/B075CFXY8V/ref=sr_1_4?s=wireless&ie=UTF8&qid=1515022153&sr=1-4&keywords=ntag215 Edit 2: NTAG's with a safe bet can only be written once, so use them with caution.