Pencils and non toxic markers are fine I think
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Awesome, I was worried about the lead being absorbed and hurting the embryo. Our maybe I'm just an idiot, haha.

My dad always said when I was little The only stupid question is the one that isn't asked.![]()

Thank you, I feel better now. What do you use to mark the air cell? Are lead pencils okay?
Lead pencils have no lead in them, it's graphite, a soft mineral. They are perfectly safe. But Sharpies smear less.

That's what I thought but the packet says lead pencils.
