Gordon Penrose

Bubble Splash Zoom!

Bubble Splash Zoom!

1999

Dr. Zed's sensational science activities

1996

Magic Mud

1994

Dr. Zed's Dazzling Book of Sci

Dr. Zed's Dazzling Book of Science Activites (Owl Book)

1993

More science surprises from Dr. Zed

1992

Sensational science activities with Dr. Zed

1990

[Dr. Zed's] Magic Mud and Other Great Experiments

1988

Magic mud and other great experiments

1988

Dr. Zed's dazzling book of sci

Dr. Zed's dazzling book of science activities

1982

Doctor Zed's Zany Brilliant Bo

Doctor Zed's Zany Brilliant Book of Science Experiments

1978

Dr. Zed's zany brilliant book

Dr. Zed's zany brilliant book of science experiments

1977

It's Dr. Zed's brilliant book of science experiments

1977