Answer: A science fair.
Explanation: There was one time when I competed in a science fair, and it was a lot of fun. I learned many things and met many people. My experiment was on measuring the density of gelatin when at different temperatures and mixed with different solutions such as salt, sugar, milk, water, etc. This next step was an improvement because I learned many facts and a good lesson. All in all it was a great experience for everyone involved and everyone involved learned many things.