This 3rd and 4th grade elementary summer camp was for 5 days for 1hr and 20min each day.
I borrowed many ideas/games/materials from this site and other places around the internet. Thanks to all those who posted their stuff so I could 'borrow' it.
Here's the basic run down:
Day 1: Balloon popping intro, Make a passport, present passport
Day 2: Korea and North America 20min PPT, 6 games rotated every 10 minutes (Duck Duck Goose, Hopscotch, Red light green light, Taekwondo please game, black flag white flag, and a word search)
Day 3: Brazil and India 20min PPT, 6 games rotated every 10 min (Everybody wearing..., Amazon slap n' say, Whisper game, Yoga please game, Tea party memory game, and Kokli Chipaki)
Day 4: Italy and Spain 20min PPT, 6 games rotated every 10 min (Make a pizza, On the road to Rome, Fountain game, Soccer please game, Country coloring and La Semana)
Day 5: Treasure Hunt
The games are supposed to be related to the countries they learned about that day. For example Kokli Chipaki is a game played by children in India.
Also, I had 37 students in 3rd grade, so I split the class into 2 teams and had the Korean teacher run half the games. But for a smaller camp you can easily do it as one big group.
The stamps were made from erasers. They looked cool and were fun to make.
I begged my co-teacher to buy ice cream for all the students as the treasure at the end of the treasure hunt. They were hot and tired, and ice cream was the perfect ending to the camp.
Lastly, the kids absolutely loved the camp. They especially loved Duck duck goose, red light green light, Soccer please game, and the treasure hunt. They didn't like the Fountain game, Tea party memory game, or La Semana.
[Update - I've attached the pictures I used to make the stamps in reply#13.]
[Update 2 - Game instructions are in the first attachment of this post for 3rd and 4th grade (above the pictures), and in reply#2 for 5th and 6th grade.