Good Extra Curricular Activities

Hi,
I have read articles and other pieces of works that stated you need a “spike” to show interest. I hope to attended a top college(hopefully Ivy League) as a political science major. What are good extra curricular activities to show my instrest in politics. I am a sophomore and am in Key Club and DECA and have around 300 volunteer hours at a hospital(I used to want to be a doctor). Also, my school does not offer Model UN and debate club and I didn’t run for student council. All in all, what are some suggestions to show my interest in politics or is being well rounded not bad for a candidate at Harvard, Yale, or Princeton?