Arrange pretzels on two parchment-lined baking sheets in groups of 8 with the ends meeting in the center in a star arrangement.
Melt chocolate and white chocolate in microwave-safe bowls. Spoon the melted chocolates into plastic baggies and cut one corner off of each bag.Note: melt for 30 seconds, stir, then melt for an additional 15-20 seconds or until the chocolate is melted and smooth.
Squeeze a dime-sized amount of chocolate onto the center of each pretzel arrangement.Press two candy eyes into the center of the melted chocolate. A toothpick works great to press down without getting chocolate onto your fingers.Add 3 rings of white chocolate around the pretzel arrangements.
Drag a toothpick through each section to create the "web".
Add sprinkles.Let spiderwebs sit at room temperature for 30 minutes to harden or place in the refrigerator for 15 minutes.