Ihave a science fair soon and i need to make a interesting experiment but i want it to be easy in the same time. can you me out

People love anything with bacteria.

You should make a density trap, you get different liquids with different density's ( corn starch , water , alcohol , syrup) and pour them into a big vase and the different density's will sit on top of each other . the best thing to do is to use food coloring so that  each level is a different color.

Relationships are difficult because people choose to walk away instead of having to try harder.