Before that i just made bags that didn’t close! Magnetic snaps seemed like some kind of wizardry only available to people who were experts in bag making.
Having a bag that does not close is not a good thing. Apart from anything else, stuff gets wet. Zips are fine sometimes but they can be awkward, especially if you are also using you hands to do other things, like hang on to a todder so they don’t run into the road.
Magnetic snaps come with 4 bits. 2 of the bits are the closure itself and the other 2 bits are what holds it in place. The snap is attached to the lining and the bits that hold it in place are hidden between the lining and the interfacing.
Adding interfacing to the lining first will give the fabric more strength and stability. It will also be less likely to fray so snap will stay put and the lining of your bag will be less likely to tear.
Match up the sides of your bag and mark exactly where the snap needs to go before cutting anything.
The prongs of the snap will need to be pressed down hard. If you find that it hurts your thumbs or if you are worried about ruining your nails, bend the prongs a little bit, then cover them with a tea towel before pressing them all the way down.