Tint ultra-concentrated icing. Use Color Right base colors and QuickCount color formulas to tint icing in the following shades:
Neutral Gray (formula 537): 1/4 cup white icing + 1 BK
Winter Brown (formula 7517): ¼ cup white icing + 26 BR + 8 C + 5 O + 1 BK
Summer Red (formula 032): ¼ cup white icing + 5 R + 1 O
Summer Sand (formula 7509): ¼ cup white icing + 7 Y + 1 BR + 1 R
Pastel Pink (formula 1895): ¼ cup white icing + 1 P
Blue (formula 2985): ¼ cup white icing + 5 B + 1 BK
Spring Green (formula 360): ¼ cup white icing + 1 B + 5 Y
Mix ultra-concentrated icing with white icing.
For gray, mix 1 teaspoon ultra-concentrated Neutral Gray with ¼ cup white icing
For brown, mix 1 teaspoon ultra-concentrated Winter Brown with ¼ cup white icing
For sand, mix 1 teaspoon ultra-concentrated Summer Sand with ¼ cup white icing
For pink, mix 1 teaspoon ultra-concentrated Pastel Pink with ¼ cup white icing
For blue, mix 1 teaspoon ultra-concentrated Blue with ¼ cup white icing
For green, mix 2 teaspoons ultra-concentrated Spring Green with ¼ cup white icing
Reserve 1 ¼ cups icing white.
Note: Ultra-concentrated Summer Red will be used as is.
Make cereal treats.
Press mixture into pan, about ½ to ¾ in. thick. Unmold and cut into rectangles, 3 ½ in. long x 2 ½ in. wide. Ice tops of treats smooth with white icing.
Prepare decorating bags.
Tint icing gray, brown, red, sand, pink, blue and green following color formulas above.
Prepare three disposable decorating bags with tip 1 and fill separately with blue, pink and brown icing. Prepare two disposable bags with tip 2 and fill separately with gray and white icing. Prepare two disposable bags with tip 4 and fill separately with red and sand icing. Prepare one disposable bag with coupler and tip 349; fill with green icing.
Decorate lined paper.
Pipe tip 1 horizontal lines in blue, about ½ in. apart. Pipe tip 1 vertical line in pink, about ¼ in. from left edge.
Print tip 2 messages in gray.
For apple, pipe tip 4 red dot; pat smooth with finger dipped in cornstarch. Pipe tip 1 brown stem. Pipe tip 349 green leaf.
For bookworm, pipe tip 4 green ball head and dot body; flatten and smooth with finger dipped in cornstarch. Pipe tip 2 white dot eyes. Pipe tip 1 brown dot pupils and outline mouth.
For heart, pipe two tip 4 red beads; pat smooth.
For cookies, pipe tip 4 sand balls; flatten and smooth. Pipe tip 1 brown dot chocolate chips.