Create a logo and icon for a history/educational app

Hi, we are looking for a logo and app icon for our app. It's an educational app that will teach world history.

The logo needs to look modern, professional, clean, but also fun, warm, and approachable.
I've attached some inspiration of logos we like. Think of examples like Tandem, Acadium, AirBnb and Signal.


We have three ideas to start out (which you can see in the attachments, more detail will be provided on project acceptance). We want to explore these further, but we're also happy to see your ideas so please factor this into your time and costs. The project will look something like:
- Initial exploration of the ideas
- Selection of a couple of these ideas with further revision and feedback
- A round of further revision and feedback
- Ideally the final changes and delivery

Final deliverables we expect:
Icon as square for app icon (colour) - vector and Illustrator files
Icon as square for app icon (monochrome) - vector and Illustrator files
Logo with text in vertical lockup (colour) - vector and Illustrator files
Logo with text in horizontal lockup (colour) - vector and Illustrator files

With delivery of the files, you accept that we have full rights to use the logo and icon as our intellectual property.