It is day 12 and they just grew enough so they can pop their heads above the plate and discover a new world.Quick question: What is the distance between the top of the heat-plate and the rim of the box?
Have they already discovered that the top of the heat-plate is a nice place to sit?
If they were to stand on the top I think it would be no big problem for them to hop out so we're always putting a lid - mesh screen on top of the crate.