Make stars one day in advance. For each treat, knead a pinch of Gum-Tex into 1/2 oz. fondant. Tint 2/3 fondant blue and 1/3 fondant red.
Use fondant roller with purple guide rings to roll out blue fondant 1/8 in. thick. Use medium Cut-Out to cut one blue star per treat.
Use fondant roller to press red fondant into kids party mold to make one small red star per treat. Let stars dry on cornstarch-dusted cake board overnight.