There are not a ton of things for younger kids to do in the evening around Billings, but I found five that I would feel 100% comfortable sending my 6 and 11-year-old kids to go do with a responsible babysitter.
Mysterious loud booms around Billings seem to happen a lot. Another was reported on local social media on Sunday night. The common explanation is that maybe a transformer exploded. However, that doesn't seem entirely plausible.