Second Grade scientists are learning about plants. We're still at the early stage in our planting and, so far, we've planted some seeds and observed nothing happening from above.
With all the conditions being pretty optimal for growth, some Second Grade scientists hypothesized that there probably is growth happening but we just can't see under the soil. They chose not too dig them up so as not to disturb whatever is happening under there.
Instead we are also growing seeds in a ziploc bag.
Based on their observations, they know there probably is stuff happening in the soil that they just can't see . . . yet.
Here's a great video of an acorn over an 8-month period that shows what does happen under the soil. It's beautiful: