Design Critique Please

Posting for a student:

I’m working on a math workbook for fourth grade.
The client wants the text bigger, now it’s size 14, she wants size 16.
She suggested keeping the examples 14 and making the word problem 16. I think that’s wrong. What do you think?

I agree with you. The size as is looks fine, and I wouldn’t make the point size bigger for just the word problems. You can try it and show her and explain why you think it should be the same size, looks more unified etc. You could make the graphics bigger, specifically the mailbox, as illustrations appeal to children.