Cast and plot for a live-action movie

If a live-action Magic School Bus movie ever happened, I think the cast should be:

Amy Adams as Ms. Frizzle
Hayley Kiyoko as Wanda
Keke Palmer as Keesha
Myself as Ralphie
Grayson Russell as Arnold (Fregley, Grayson's character in "Diary of a Wimpy Kid" does resemble Arnold)
Moises Arias as Carlos
Peyton Roi List as Dorothy Ann (D.A.)
Tyler James Williams as Tim
Bailee Madison as Phoebe

What do you guys think of this cast list? Who would you cast in these roles? Also, what would the plot be?