[Kathyy]

I'd put up food and toys today and he only gets them when safe in his crate or separated by a physical barrier from the kids. You might even put up a pen around the crate so he isn't worried about poking fingers although I'm sure the kids are well behaved and don't do that anyway. I'd contact a behaviorist to get better hints on how the kids can modify their body language around him. Not staring at him, turning away, how to get him to respond to them with toys and food and so on. The booklet is helpful and do get it but your idea and what's really going on need an impartial expert eye. Timing is all and not easy!

Really good that you noticed this and are planning to adjust a bit so your pup feels more secure.