That terrarium project looks so cool. It could work well with all grade levels I teach. I wonder what kind of plants could work well in a terrarium, and how long it would take to see plant growth. I was surprised at the use of activated charcoal to slow bacterial growth. Is this the only material that could safely be used for this purpose with small children?
How much would a project like this cost for a classroom of maybe 25 students? My school has done the standard lima bean germination project but this would be a serious upgrade. I look forward to doing this project with my students next year.
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