What you need  
3/4 cup boiling water
1 pkg.(4-serving size) JELL-O Sparkling Wild Berry Flavor Gelatin               
1/2 cup sugar                                                                                                            
2 cups cold club soda or seltzer                                                                          

Make it                                                                                
STIR boiling water into combined gelatin and sugar in large bowl at least 2 minutes until completely dissolved. Stir in club soda. Pour into 9-inch square pan; cover.

FREEZE about 1-1/2 hours or until ice crystals form 1 inch around edges. Spoon into blender container; cover. Blend on high speed 30 seconds or until smooth. Return to pan; cover.

FREEZE 6 hours or overnight until firm. Scoop into dessert dishes. Store leftover sorbet in freezer.