If they primarily play games on a Nintendo console (e.g., the 3DS or the Switch), get them aNintendo eShopgift card. Here is a list with all the gift cards mentioned above and locations where you can find them. Platform Steam
you might be better off buying rbc visa gift cards than that vanilla garbage. I don't know. I used one before on Steam and I got charged international transaction fees. wtf. they say in really fine print on the front of those vanilla things about the foreign transactions. also, the RBC...