The 3DDD Number Mystery (ebook)
by Don Ebert & Barb Schwartz , dondiago
A 3D book designed for children to have fun while learning numbers
About the Author
Don Ebert, dondiago
Rockford, Illinois, U.S.A.
43 years machine designer - 5 years entertainer - many years computer graphics artist - author of one book (As I See It - From Down Here).