This was a great game we played at my shower. I was given a bunch of ingredients: flour, sugar, milk, water, baking powder, baking soda, vanilla, butter, eggs, oil, etc. Then I was told to make a one layer cake from scratch. If I requested an ingredient that wasn't on the table, one of the guests brought it to me from the kitchen. While I was mixing and measuring, the guests were given sheets of paper and pencils and told to write down their own recipes, as well as make suggestions to me. One person also wrote down my "recipe" as I threw things together in a bowl. When I was finished, the cake went into the oven at a temperature and duration I specified.
We opened gifts while it was baking. When it was done, I was required to taste at least one bite. Well, it came out like a flat, sweet pound cake gone bad. Everyone laughed, and then we compared recipes. The guest who was closest to the actual recipe (it can be any "scratch" cake recipe from a cookbook) won a prize. My favorite part is the moral of the game: that marriage and children don't come with recipes, so we rely on the help of friends and family as we go along.