I want a kids’ book about a kid with a pet ankylosaurus. They can ride it around, it sits outside their school and waits for them (though it keeps eating the plants, which infuriates the groundskeeper). It’s a given the entire time that this is the only kid who’s ever had a dinosaur pet. On the last page, they’re trundling down the street, and over the crest of the road, they meet another kid riding a T-Rex.