I heard Google was making one so I thought I should have a go too. It's not particularly smart, but I was only 10 at the time so neither was I.
Automated Plant Waterer
I wasn't always around to water my plant, why not have an Arduino do it for me? It has a water moisture sensor to detect when the soil becomes dry and dispenses an appropriate amount of water.
I have experience in Full Stack Web Development, App Development, AI, Data
Structures and work with a range of languages and technologies including
"He showed great technical abilities, aptitude and intelligence ...
... was a punctual, responsible and personable young man. Capable of thinking
on his feet and handling a variety of situations."
- Simon Brown (NowTV work experience manager)