- creating home/iot alerts maybe with zapier/email/twilio
- creating a chatbot based on a pdf
- creating an RSVP site for your upcoming family _
- creating a browser extension
- creating a guest wifi login system with credits/timeouts
- creating a Dropbox alternative with S3
- a website that tells you which day of the week you were born
You're welcome
Line following, object avoidance, maze solving, all sorts of cool options.
A relatively cheap option would be the micro:bit [1] and a chassis [2]. The micro:bit can run CircuitPython [3] which is an simplified version of Python that can run on embedded systems.
This setup offers lots of room for growth from graphical programming, to circuitpython, and then on to C programming.
[1] https://www.adafruit.com/product/4781