Books like The Magic School Bus Makes A Rainbow
Joanna Cole, Mary Pope Osborne, Jocelyn Stevenson, Carolyn Bracken, George Bloom
The Magic School Bus Makes A Rainbow is 32 pages, about 35 minutes at 250 words a minute.
8 books to read next
How long each takes
All the Colors of the Rainbow 34 min 
A Rainbow of My Own 35 min 
Regenkobolde 35 min 
The Color Monster 44 min 
Purple, Green and Yellow 35 min 
My Very First Book of Colors 13 min 
Yellow & Pink 35 min 
Color, Color, Color, Color 48 min Bar height shows length. Estimated at 250 words a minute.