"COSTUME DAY TOMORROW" is a Halloween reminder poster for a school costume day, in a playful, cute cartoon style. Dripping orange, green and purple letters sit in two lines above a glowing jack-o'-lantern in a witch hat, with a green backpack and candies. Swap in your own headline, school name and instructions to remind your class or event.

Create a complete 9:16 vertical Instagram story for a playful, family-friendly school Halloween announcement. Keep the top 25% and bottom 20% mostly clear; place every word and the central illustration inside the middle safe area. The centerpiece is the exact headline “COSTUME DAY TOMORROW”, set in two centered lines, large and immediately readable at phone-thumbnail size. Below it, set the exact supporting line “Oakwood Elementary · wear your costume to class.” on one centered line in smaller but clear lettering. No other words or lettering. Use plump, bouncy, slightly wobbly rounded display letters with wide open counters, thick dark outlines and tiny cheerful ooze drips. Fill the headline letters with crisp candy-bright pumpkin orange, slime green and spooky purple, with a soft cartoon highlight. Keep the smaller supporting line in a simple bold rounded sans serif for easy reading. Make the headline the strongest element; do not let effects obscure any letters. Build a small friendly jack-o’-lantern hero prop directly beneath the copy: a smiling carved pumpkin dressed in a little purple witch hat and a bright green school backpack, with two tiny candy pieces nearby. Add sparse star-shaped sparkles and a few fine spiderweb strands as framing accents. Use a deep indigo-purple night background, warm pumpkin candle glow behind the pumpkin, and clean high-contrast edges. Festive, bright, kid-appropriate Halloween illustration, smooth cartoon shading, clear negative space, polished digital poster finish. No gore, blood, frightening faces, fake app interface, buttons, arrows, logos, or extra text.