help me for a science fair!!

[ghalya ⸆⸉]

heyyy, so i have a science fair coming soon and i still don’t know what i should do. i was wondering if anyone has topic ideas for me or a project that you did once and it had a good result. i was told that i can only do experiments, but if u give me a researching topic i’ll try to convince my teacher to allow me to do it!! it would be awesome if anyone gives me ideas!!<33