Choux pastry, the stuff that eclairs and the like are made of, isn't as hard as it sounds if you watch a few videos. Churros are similar, there is a bit of a process but it's easier than it sounds (but you will need a piping bag). For something with shelf life, you could buy a cake tin and go for a Black Forest cake. The one from Sally's Baking Addiction is actually a rock solid recipe.