Discover Engineering Family Day at the National Building Museum

Highlights:

Watching some guy from t.v.'s Design Squad shoot up to the ceiling on a rope ascender
Eating free popcorn
Designing a "space ship" with a plastic cup, tape, straws, and mini marshmallows & eating the marshmallow "astronauts"
Playing in the Building Zone
Making a biosphere out of toothpicks and gumdrops (according to Lizzie it was, "Where they used to put dead people in the olden days. You know, a pyramid.")