Okay, it wasn't a lot, but we did get some info out of this.
Science fair/truck thing is big. They thought the kids were going to do their review of the projects Friday morning, so Terri was going to go and watch.
My guess is that when she showed up and realized she had missed it (it was Thursday) she decided to leave and pick up the project later. She thought she needed the truck to take the project home after, but probably didn't want to stay an extra hour or so with the baby.
Also, KH and DY are not acting on the advice of LE when they make these statements. The way DY said "Unfortunately we do it on our own" made it sound like they aren't getting a lot of advice from LE on what to say and wish there was more. Maybe even that they make a statement and then get a hand slap for saying something wrong.
Terri never referred to as a suspect by LE to them. No evidence that they know of about where Kyron is, a possible motive, or who else might be involved.
A lot of speculation.