Carefully cut pretzel sticks into 3 pieces, and set aside.
Using the frosting as glue, attach a kiss to a Nilla Wafer {pointed tip of kiss facing down}
Then use a little more frosting to attach a pretzel piece to the top of the cookie as a stem. {you can add a small amount of frosting for this part more precisely using a toothpick}
Let the frosting set for about 20 minutes before serving. {if you want them to set faster, just transfer to the refrigerator}