I got to be in the temple last weekend with my parents and every one of my siblings.
It was a sweet experience to watch him in the temple as he received his endowment. I'm stealing the following definition from my brother who found it at lds.org.
Endowment. In a general sense, a gift of power from God. Worthy members of the Church can receive a gift of power through ordinances in the temple that gives them the instruction and covenants of the Holy Priesthood that they need in order to attain exaltation. The endowment includes instruction about the plan of salvation.
There you go. You can read more at mormon.org
I love the temple, and I love being in the temple with my family. My little cute pregnant sister even got to come and be with us in the temple all the way from Idaho and we all made sacrifices so that we could do this together. (Plus, we got to enjoy the deliciousness that is J. Alexander's afterward!)
The craziness will continue for one more week until Sam and my parents leave for a week of diving in Mexico (I know, life is rough for them!) and then he is off to the Missionary Training Center!