When my sons Joey and Topher were turning 7 and 2 my husband and I threw them a Geology themed party. There's not a lot out there so we had to make everything ourselves. The boys loved it and even though we were snowed inside it came out great!
This party would be such a blast outdoors. There's a ton of room for creativity. These are just some ideas to get you going.
ABOVE:
Food-
Volcano Cake
Dinosaur Cake
Earth's Vegetational Layer (Veggie Tray)
Sedimentary Layered Dip (7-layer dip)
Stalactites and Stalagmites (Tortilla chips)
T-Rex Droppings (Bread and Butter)
Fossils and Lava (Baked Ziti)
Geodes (Cheese and Tomato Stuffed Meatballs)
Vegetable Flowers and Snails
Games-
Panning for gold
Break your own Geodes
Baking soda and red dye volcano
Dinosaur pinata