How do i detect two collider of one object landed on something?

Hi guys.

I have a star in the scene (using SM2). Each point has a box collider attached to it (no rigibody). The points are children of a main object (this one has rigibody). How can i detect if two points of the star land on something and then start counting?

My code using OnCollisionStay works, but it works even when there is only one point land on something else.

Thanks!

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