Cute contemporary children's book. Ava and Mateo visit an assortment of dinosaurs and their flying and swimming cousins, via a compact time machine.

I like that there's a key in the back in the event that you can't find all the hidden images (I skipped the last few, but had found them all so far). And I liked Ava & Mateo's field outfits.

For the record, we purchased our two copies at full retail price.