Doubts and Indecision

For a while I've been having some doubts and indecision about the topic of my science research project. Yesterday, I started looking up alternative ideas. I tried searching for projects which only required equipment found in every day homes. This is some ideas that I found that I'm interested in:

• Does the temperature of candles affect it's burning time?
• Does the quality of soap affect the time it takes before bubbles pop?
• Does colour affect the burning time of candles?
• Does the width of a candle affect it's burning time?
• What is the most effective way to keep a balloon from popping?

A lot of the ideas had something to do with candles because basically I found candles interesting and for that moment I wanted to do an experiment on candles. 

Today, after the science lesson, I asked sir whether or not the experiment on the width of candles would be okay. He approved of it and offered an alternative which was "whether the quality of candles will affect it's burning rate."

For some reason, after I asked my teacher, I felt like doing the experiment on the effect of salt on the boiling temperature of water again. I'm probably just going to do that. I already have all the information and method and such. It was probably just a moment of indecisiveness. I'm going to see if I have time to do the experiment today.