All science teachers can remember their greatest lessons and teaching experiences.
I remember teaching science to first graders by wheeling a cart of guppies from class to class. If I was lucky, the jumping guppies would end up on the cart and in one of the containers. That hands-on part of science will never change. It used to be that walking down the hallways, borrowing ideas, or sharing with colleagues for a few moments before or after a teachers' meeting, was the only way to share those experiences, or gain new ideas. Those times have certainly changed.