C.M.
I didn't really have any games or anything planned for my daughter's 1st or 2nd birthday. I did have toys outside for the kids for her first and for the second, I had a bunch of bubbles and a swingset (also an August bday).
This year for my son's 1st birthday (August also- so I'm a planner like you!), I plan on having it outside at our house, serving hotdogs and hamburgers, chips/dips, juice boxes/soda, a cake and pre-made sugar cookies that the kids can decorate. We usually have about 6 kids ages 1-3 and then 5 kids aged 9-12 plus family so it's usually between 30-50 people. I'm going to have the kids take home their decorated cookies as their favors along with a few other things - maybe candy and bubbles. I am also going to have everyone bob for apples!! I'm also going to have each child get their face painted.
For my daughter's 3rd birthday, *unsure of theme yet*, we are also doing it at our house, are having pizzas, cookies, donuts, soda, juice and I'm going to have each child do a Pudding Painting - where they can paint with vanilla or chocolate pudding. and then we're going to play "See who can eat the marshmallow on a string the fastest without using their hands." Not really a title but I don't know what else to call it! We'll also have a pinata!
Their birthdays are two weeks apart so I think we'll try to separate their birthdays three weekends apart just so it's easier financially for us and for others to come over. We may have our son's 1st bday double as a Labor Day BBQ and have everyone bring something for a potluck.