One creative adult birthday party decoration idea is balloons with paper ice cream cones glued to them to resemble large ice cream cones. This is a decoration for a retro adult milkshake bar theme, and other decorations include a decorative printed menu of suggested ice cream and alcohol combinations.
For a brightly-colored country birthday theme, gold-letter balloons can be paired with a display of colorful sweets for birthday guests. Other decorative food items include cupcakes, miniature apple pies and a fresh-fruit covered naked layer cake. More decorations for this theme include a paper fan backdrop colored in orange and yellow and white cake stands decorated with bright ribbons. To enhance the country theme, mason jar cups can be served filled with mint lemonade and decorated crafted flowers and pink chevron straws. Final decorations for this theme are yellow chairs, pink linens for tables and orange risers with floral arrangements.
Another interesting adult birthday theme is a steampunk theme. Decorations for this theme include a Nerf gun painted a metallic shade and cakes with decorative gears on them. Other decorative food items include cookies decorated with chains and clocks and both pretzels and Rice Krispies covered in edible metallic gold glitter. Another decoration for this theme is a pair of welding goggles with gears glued to it.