Prepare cake batter according to directions on box. Fold chopped SNICKERS® BRAND FUN SIZE® into batter before pouring into greased and parchment-lined baking pan. Bake in preheated 350? oven for 30 minutes. Cool completely.

Using printable templates, cut cake into stroller shape.

Prepare frostings: Divide one container of frosting between three bowls. Tint one bowl pink, one bowl blue and leave third bowl white. Place each color in resealable plastic bags with snipped corner, set aside. Tint remaining frosting container of yellow.

Decorate the cake: Cover cake with yellow frosting. Using photo as guide, pipe white lines along stroller’s shade. Pipe a lattice pattern on lower part of stroller with both blue and pink frosting, about 1/2-inch apart. Add M&M’S® BRAND Milk Chocolate Candies where frostings cross. Place doughnut halves as wheels. Pipe centers with vanilla frosting and top with M&M’S® BRAND Milk Chocolate Candies. Pipe a white dot outline along the top edge of cake. Stack 3 TWIX® BRAND Caramel Cookie Bars FUN SIZE® and arrange as stroller’s handle.