I dropped them in at the same time and started stirring evenly with both hands after setting my timer.
After about 3 minutes, the Skittle in the warm water had dissolved. The Skittle in room temperature water took about 5 minutes. You can repeat with two more trials for added reliability.
This is a simple experiment to do with your class for the beginning of the year , before Science Faiar, or any time.
The Skittles experiment, along with suggestions, and printables, is available in my iLearn Science pack. There is a PowerPoint, 8 stations, 2 activities, the Skittles experiment, and a lot of guidance on how to get a great start in science those first few weeks of school.