For frog faces, prepare decorating bag with reserved melted Bright White candy; cut small hole in tip. Pipe in top two holes of pretzels to form eyes. Reserve remaining melted white candy for later step.
Prepare decorating bag with melted black candy; cut small hole in tip. Pipe mouth in remaining hole of frog face. Chill until set, about 5 minutes.
Prepare decorating bag with melted Red candy; cut small hole in tip. Pipe tongue on each frog mouth. Let set, about 5 minutes.
Using reserved melted white candy, attach candy eyeballs to frog face.
Using remaining candy in the same color, attach candy-coated legs to back of frog face.