Cute short animation. Some critiques:
In some parts the shadows didn't connect with the figures. The shadow should always sprout from the figure. The dinosaur fossil felt a bit flat, maybe add more shading to make it "POP". Animation was fairly solid, some parts weren't fully colored in but overall it was smooth and visually appealing. I enjoyed it and I look forward to more fully-fleshed animations from you in the future. :D