Tint fondant: 32 oz. green, 24 oz. blue. Prepare cakes and cover with blue fondant. Roll out green 1/8 in thick. Use plates from stand to mark sizes; cut fondant to cover tops of plates and attach with Piping Gel, trimming as needed. For hills, cut 1 3/4 in. wide strips: one 19 in. long for 6 in. cake; two 13 in. long for 8 in. cake; two 16 in. long for 10 in. cake. Cut wavy top edge; attach to cake sides using damp brush. For tracks, mark 2 circles, 1 in. apart, on cake tops; begin outer circle 1/2 in. from outer edge. For ties, use Cake Dividing Wheel to divide 6 in. cake into 16ths, 8 in. and 10 in. cakes into 12ths (add an additional line in between for 24 lines). Cover marks using black FoodWriter. Pipe tip 6 message.