She will have no idea what is going on. Kids that age do not care about themes or activities or games. They just like to open a few toys. Keep is small and simple, with just CLOSE family or a FEW friends. Do not worry about decorations or goodie bags or anything. Get a few cupcakes in different flavors and stick a candle in Jayden's. You could arrange the cupcakes on a tray or a cookie sheet covered with foil - make them into a "J" or into a "2". Simple simple. Not sure what you are scared of - if it's Jayden's reaction, don't worry because she has no expectations at this age. If it's the reaction or expectations of other people, you're inviting the wrong people! Childrearing experts caution AGAINST overwhelming and overstimulating young children with big overblown parties. Even 5 and 6 year olds get overwhelmed with a huge to-do. We kept our parties simple and everyone always had fun - when our son turned 5, he got to invite 5 friends. The parents didn't stay, they came back in 2 hours. When he turned 7, he got to invite 7 friends. None of this "entire class must come" nonsense! I didn't want my son to get 25 gifts, and I didn't want to spend the year going to 25 parties of other kids, half of whom he wasn't all that friendly with. For you, just invite a couple of neighbors or your immediate family, whomever are important to you and Jayden. Scale your intentions way back and everyone will have a much better time just enjoying each other's company!