Ohh a 50s style theme with Gelatin desserts!
Here's some inspiration:
Peaches and Cream Gelatin Salad, Gelatin Flower Cake
(Yes that's 100% Jello. They're really big in Mexico City)
Mosaic Gelatin Squares, Jello City, Really any crazy type molded Gelatin would do, and a thanksgiving favorite Cranberry Gelatin Salad
The Gelatin Maker could be a mini fridge with where you mix the gelatin then cool it.
Edit: Also I know we already had the tea update (I missed it), but I would really like a small side table with a serving of High Tea on it. There are three plates on it, one is Scones with jam and cream, the next finger sandwiches, and the thirds is cookies and cakes. It would also have a teapot and a teacup on the little table.