These don't appear to be on sale for Prime day, but they are 100% worth having. An Electric Nose Sucker!

We've used both of these:

This one was the first one we had, great for newborns and early on because it has lights that flash and can keep their attention a little. Sadly ours took a dunk in the toilet, so we replaced it with.

Second One, this one doesn't have lights but does still have music. We find we like the straight design better than the curved one.

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You mentioned baby monitors. The one we use is also not on sale, so I won't link it. But I will say, make sure to get one with an actual monitor screen included. The ones that can use an app are nice, but being able to always have the monitor showing while doing other things (scrolling facebook, calling someone, etc) is just extra peace of mind.

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I'll try to watch the baby deals and see if anything pops up that We've had experience with that I would recommend. I'll comment again if anything does show up!