90s kid book, grandma and kid have a day out, but they can secretly fly.

They have a day out; they feed the giraffes (way up high because they can fly) and they get ice cream. It seems no-one notices that they can fly and the rest of the family can’t/don’t acknowledge it. (I feel like at some point another child on the street sees/notices but the kids mom just pulls them along?).
It’s a kids book and has pictures, but it’s not a true picture book. (Writing is a paragraph or two at a time).
I hope someone can help, this really feels like a fever dream but I told my mom and she too vaguely recalls.
Ty!!

Anyone?

Colour illustrations? So for upper primary school age, 9-12 age range? Some picture books do have more text and are still called picture books. Eg. Books by Graham Oakley.
Is she called grandma in the story?
Early or late 1990s? New or older?
A year range helps when searching worldcat.org.
Is the kid a boy or girl?
My first thought was the Super gran books. But think they are chapter books.

Wild guess, but it sounds like the sort of thing Elvira Woodruff might have written.

The first book that came to mind was No Flying in the House by Betty Brock.

Abuela is an imagined day of flying with her Spanish grandma.

>3 bookel: not Graham Oakley, but similar painted imagine and yes in color. It’s definitely a picture book, not chapters as the pictures take primary focus on each page. She is Called grandma, I feel like the child is a girl but that could just have been child-me projecting that on the character. I had it as a young kid 6-10 and I was born in ‘94. It could have come out before that but not after 1999 would be my guess.

>4 beyondthefourthwall: not Elvira, those are all too long/more chapter book than the one I’m looking for

>5 ysdir: not this on, but a great book!

>6 2wonderY: not this one, but good suggestion. The book I am thinking of is not Spanish at all

The Flying Grandmother comes up, but no cover image. I’ll try googling it.