Molecules and HeatRichard Kaufman, Linda Eisenberg, Timothy White, Bob Friedhoffer · First published 2018Open the Tome
More Magic Tricks, Science FactsRichard Kaufman, Timothy White, Bob Friedhoffer · First published 2018Open the Tome
Physics Lab in the Hardware Store, Houseware Store, Home, and SupermarketBob Friedhoffer · First published 2018Open the Tome
Scientific American, Simple Science Fair Projects, Grades 3-5Bob Friedhoffer · First published 2018Open the Tome
Physics Lab in the Hardware Store, Housewares Store, Home, and the SupermarketBob Friedhoffer · First published 2017Open the Tome
Scientific American, Winning Science Fair Projects, Grades 5-7Bob Friedhoffer · First published 2017Open the Tome
Everything you need for Simple Science Fair ProjectsBob Friedhoffer · First published 2006Open the Tome
Everything you need for Winning Science Fair ProjectsBob Friedhoffer · First published 2006Open the Tome
Physics Lab in a Housewares Store (Physical Science Labs)Bob Friedhoffer · First published 2001Open the Tome
Physics Lab in a Hardware Store (Physical Science Labs)Bob Friedhoffer · First published 1997Open the Tome
