How do I wake phsyics objects at a certain keyframe?

Thanks! This headed me in the right direction.

Only thing is in the tutorial he is using a vector to translate a cube. How can I make an event that talks to the physics checkbox? If I select an bolean instead of the vector in my structure, I only get a checkbox but cant specify the command.

Everything else seems clear! Just that one part where I can make the event communicate something different then translation is unclear to me.