It will likely tell you to click the "See Inside" button at the top right of the screen. From there, it will instruct you to open your "Backpack" (a tool at the bottom of the Scratch editor) and drag the DoodleLearning sprites from the project into your backpack so you can drop them into your own creations.
For this specific project, the creator should be using this space to state that the original logos and brand name are the property of Discovery Education. If the Scratch user borrowed the vector files from another Scratch user and modified them, they would also mention that user's name here.