Make flower petals one day in advance. Knead 1/8 teaspoon of Gum-Tex into 2 oz. each orange, purple and pink fondant. Use fondant roller with pink guide rings to roll our each color, separately, 1/16 in. thick.
Use medium oval Cut-Out to cut six petals per flower. Cut extra to allow for breakage. Use medium round Cut-Out to cut 1/8 in. off each oval petal at one of the longest ends. Let dry overnight on cornstarch-dusted cake board.
Make cake and cake pops. Prepare batter following recipe directions. Bake and cool cake. Use knife to cut off the top half of the cake to make flower pot. (Reserve trimmed portion for another use, such as a trifle.)
Make cake pop flowers. Melt yellow Candy Melts candy according to package directions. Dip cake pops in melted yellow candy. Tap pops lightly to smooth surface. Place pops in decorating stand and chill for 10 to 15 minutes.
Use melted yellow candy to attach flower petals to cake pops. Chill until set 10 to 15 minutes.
Cover flower pot and make base with melted candy. Melt white and light cocoa Candy Melts candy, separately, according to package directions. Use orange candy color from set and a small amount of melted light cocoa candy to tint melted white candy terra cotta.
For base, place largest metal circle from set on cookie pan. Use melted candy in cut disposable decorating bag to fill cutter 1/4 in. thick. Chill until set 15 minutes. Unmold and set aside.
Invert cake on cooling grid placed over parchment paper-covered cookie pan. Use melted candy in cut disposable decorating bag to pipe candy over cake. Gently tap cooling grid to remove excess candy. Chill until set about 10 minutes.
For flower pot rim, tint 4 oz. fondant terra cotta. Use fondant roller with purple guide rings to roll out fondant 1/8 in. thick. Use fondant ribbon cutter with 1 in. spacer and straight cutting wheel to cut ribbon, 22 in. long. Use melted terra cotta candy in cut disposable decorating bag to attach strip to rim of flower pot.
Assemble flower pot. Use melted candy to attach candy base to flower pot. Let set 10 minutes.
Use a spatula to smooth melted candy on top of flower pot. Sprinkle top of flower pot with cookie crumbles. Arrange flower cake pops in flower pot.