References

1. "Science is Fun" in "Fundamentals of Physical Sciences." Janet Z. Tarino, The Ohio State University, 1990.
2. "Science Is." Susan V. Bosak. Scholastic Press, 1991. ISBN 0-5907-4070-9
3. "Teaching Chemistry with Toys: Activities for Grades K-9." McGraw-Hill, Terrific Science Press, 1995. ISBN: 0-07-064722-4
4. NASA Website: http://ldaps.ivv.nasa.gov/curriculum/curriculum/airpressure2.html