Here is the link for experiment ideas. Remember to think up your question or problem. Do research (which is included on the link). Identify your independent (one thing changed), dependent variable (what you are going to measure) and the constant variable (what stays the same).
Scientific Method
Problem/Purpose
Research
Experimental Design (independent, dependent and constant variables)
Hypothesis
Materials
Procedure
Observations (describe what you saw)
Results (display your measurements)
Conclusion
EXPERIMENTS