It's hard to see, but the banner above the guests' heads reads, "Happy Birthday Evan & Hans."
We had several relay races, one was water from bucket to bucket (#5) and one involved taking shoes off and on (#7). We started with a water balloon toss but the kids all preferred a water balloon throw so after each of the kids was armed with a balloon I gave them instructions to "get Mr. Smith" and everyone including Nathan took off running (#6).
There was some free time for playing with friends and exploring the partially built fort (#8).
Then we gave the boys one final surprise, new bikes! (#11) Happy Birthday Boys! Hopefully this will be remembered at one of the childhood "greatest days ever" in years to come.