Maxi dress, apparently its easy to sew: Its just 4 rectangles. Measure shoulder to hem length, then girth at widest part (hips?) and divide by Add seam allowance. Sew allowing for neckline, arm holes. No pattern needed.
These rainbow cubes from Hungry Rabbit are a colorful treat. Vanilla cake batter is divided into six portions before being dyed one color of the rainbow. Each color is then individually baked for a few minutes in the oven.
Balloons with photos of memories tied to the bottom is a sentimental and thoughtful proposal idea. Let her pop all of the balloons to find the ring. You can fill the rest of the balloons with sweets, glitter or flowers.