My niece is doing a science project and she wants to weigh various seeds, determine their volume and density. She tried using my kitchen scale, but it is not sensitive enough.
I've suggested weighing 100 seeds then dividing to get an average weight, but she (she's 11) wants to weigh each one. I don't want to get in the way too much. I don't mind buying a scale, or other simple equipment as long as it isn't expensive. Is there any way to do this inexpensively?