Remove core and cut each apple into 6-8 slices. This depends on the size of the apple. You want the apple slices to be about 1 - 1/5 inches thick.
Push a skewer into each apple slice.
Melt your chocolate according to package instructions. I place my melting chocolate in a large coffee mug and use my microwave to melt the chocolate by heating it for 30 seconds at a time and stirring in between until it is melted and smooth.
Dip the apple slice into the melted chocolate making sure to cover them completely. Lightly tap the skewer against the edge of your mug 3 or 4 times to remove excess chocolate.
Sprinkles, and chopped nuts can be added right after dipping but heavier toppings like mini M&Ms will need to be added once the chocolate begins to firm up otherwise they will slide off. Let the chocolate harden for about 30 seconds, to the point that it is still wet but it is starting to firm up, and then sprinkle with your toppings.
If you want you can use another flavor of melted chocolate to drizzle over the apple to add another layer of color. This is optional.
Place the apple slice, skewer down, into a mug that is tall enough that it doesn't tip over but not so tall that it touches the apple slice.
Once the chocolate is firm these are ready to serve.