[tammych]

I have to teach a 30 minute rotation lesson on the digestive system to second graders on Friday. Any ideas to make this creative, interactive and interesting. There really are no specific objectives to cover.
Thanks for any ideas.

[apple annie]

Give each child a zip loc bag and a couple of crackers or piece of bread. The bag is like the stomach - a muscle that squeezes the food. First have them pour a little orange juice or coke into the bag to act as the "digestive juices." Observe what begins to happen to the bread. Then have them squeeze the bag for two minutes. Note changes in the bread. I.e. it turns to liquid and is ready to be absorbed into the small intestine and into the blood stream. Of course it ends up being really gross, which the kids love. Just make sure the bags are really zipped.

[readerabbit]

Let them design the intestines out of play dough the way you would roll a snake.