In a large mixing bowl, combine the cereal and pretzels and mix well.  Set aside.

Add the chocolate chips to a microwave safe, heat proof bowl and microwave on high in 30 second intervals.  

Stir the chips in between until the chips are ALMOST all melted. (The residual heat from the chocolate will melt it fully. You don't want to burn the chocolate.)

Alternatively, you can melt the chocolate chips on the stove by putting them in a glass bowl that sits over a pot of simmering water

Here are some tips on melting chocolate.

Pour the melted chocolate over the cereal and pretzels – toss the mixture with your hands until the cereal and pretzels are well coated with chocolate.

While everything is still warm and soft, form small clusters and place them on parchment paper lined baking sheets.

Place the clusters in the fridge (or outside if it’s a cold day) to harden – should only take 5-10 minutes.

If your clusters aren’t sticking together because your mixture has cooled too much, place some of the mixture in a glass bowl and reheat for 30 seconds – that should melt the chocolate enough to get things sticking together again.