Disney Tangled Cake with Boat Ride Scene

My daughter's 2nd Birthday is coming up so I wanted to practice this cake.  I need to work on the tower and I want it to be a different color.  I want to add more flowers and some windows on the tower.  I like the grass with tip #233 but I need to practice with the drop flower tip #106.  

Cake: 1 box chocolate cake made with coconut instead of vegetable oil.

Buttercream - Wilton Buttercream - http://www.wilton.com/recipe/Buttercream-Icing
Marshmallow Fondant: http://www.easy-cake-ideas.com/marshmallow-fondant.html
Tower: 3 ice cream cones & 1 waffle cone
Colors:  Leaf Green for grass fondant. Leaf green + Royal blue for water fondant & tower. Kelly green for buttercream grass. Royal blue for buttercream drop flowers.