I suggest you ask this question to kids after completing this experiment. They have played with seesaw too during summer so ask them what do they relate a seesaw with in real life. But, remember this generation kid might not have seen that in reality as we are digitizing everything. Grown kids might be able to answer as they might have learned some physics in their class. One immediate example of the seesaw is the balance scale we use to measure things. Thus seesaw, in short, symbolizes the balance between two things or two people in physical weight. Also, more in detail if you deal with this topic it represents the judgment between two people by comparing their qualities.