Ice 2-layer 6, 8 and 10 in. round cakes (3 in. high) smooth in buttercream; cover cake tops with blue-tinted piping gel. Roll out blue fondant 1/8 in. thick; using pattern from Pattern Book, cut wave strips 2 in. and 1 in. high, long enough to wrap around each cake. Attach 2 in. wave to cake with icing; attach 1 in. wave to 2 in. wave with damp brush. Position cakes on Cakes 'N More 3-Tier Party Stand. Cut sign from paper; draw message and border with markers. Tape to 11 3/4 in. lollipop sticks; trim as needed and insert in cake. Position slides and kids.