Blue toy dinosaur with white spots; lost yesterday around 3pm

I lost my blue plastic dinosaur from a Playskool set yesterday around 3pm. It's about 6 inches tall, bright blue with white spots, and it has a tiny blue heart sticker on its back plus a small scratch on the left claw. There’s also a squeaker in the belly that squeaks when squeezed. I was at the Smithsonian National Air and Space Museum entrance on Independence Ave SW in Washington, DC, near the lobby gift shop, when we realized it was gone. It’s a gift from my daughter’s grandmother, so it’s got sentimental value and we really need it back.