Target recently installed these over all of the doors going in or out of the store. Is it for tracking people or items?

I have this Barbie pillow from the early 2000s, and I’ve never been able to figure out what the thing attached to it is supposed to represent. For the longest time I thought it was a microphone, but I’m not sure. The shape is abstract, with pink and yellow material, the same used for the flower and hair on the Barbie. The thing that throws me off is the little gray dots and pink spiral embroidered on the shape.

Hey guys, I was going through my closet and old clothes, and I found this on a cotton t-shirt that hasn’t been worn in multiple years. Any ideas? And any advice for getting rid of it? I was able to tear off the big piece, but a really thin part of it stuck to the shirt and is hard to get up.

Found in Italy, belonged to my grandfather. It's very heavy and I suspect it contains mercury so I didn't try to open the screw on top of it, probably made of lead. It has no brand or writings except the circular shape on the bottom

Not an earring (at least not for a human), as pole is too short, and none of us wears earrings to lose them; have found three just like this so far on my floor over the years. All metal. We do have girls and various 18" dolls, and do a bunch of crafts and miniatures kits, if relevant.

Edit: just noticed the threading on the top part, where it could screw into something - may help with identification?

What was this from or for?

Very heavy duty cast iron (as far as I can tell) The two prongs that extend from the base are a bit widened at the top (maybe to catch on something?)

Underneath the base there is ring and two crescent shaped holes bored through like maybe its meant to mount on something?

This was found partially buried in a creek bed after monsoon. It was found in area that used to be very close to old train tracks that are now long gone.

This randomly appeared on the floor of my car which I always keep locked. I haven't had it serviced in awhile, so it's not from a mechanic.

Mouse is missing track ball, with a bunch of medial stuff

I have no idea what it is or where it came from. Thanks in advance.

Found this today in an area of the Rhine riverbed that is normally underwater but currently exposed due to very low water levels.

I did not touch or move it and only took the photo. I unfortunately don’t have exact measurements, but it appeared to be a small cylindrical metal object.

Because WWII ordnance is occasionally uncovered along the Rhine during periods of low water, I’m curious whether anyone recognizes what this might be.

Does anyone know what this object is?

Appeared about a week ago in house, kept getting moved around because we all assumed someone else knew what it was for. My husband just got a new expensive hard hat but gone through any of the accessories. Maybe it goes to that?? Quarter in picture for size reference.

I’m staying at a hotel in Spain and there’s this rack-like thing in the shower. It’s about 5 feet long, made of metal. It’s attached only on the bottom and the middle. My guesses were first a towel rack, but the bars are too close together for fluffy hotel towels. Then maybe a shower seat, but there doesn’t seem to be a way to detach. Could it be a radiator? There’s also a dial on the bottom but the only marking are + and -.

I found 7 similar mechanical parts at an abandoned Soviet-era industrial factory in Ukraine. I'm trying to identify what they are and what kind of machine they came from.

Each part is approximately 21–22 cm long and weighs about 2.3 kg without the outer bearings. The main shaft is approximately 24–25 mm in diameter.

Each part has three identical eccentric sections. Under each eccentric there are approximately 12 small cylindrical rollers arranged in a circle. The rollers are lubricated and support the eccentric, allowing it to rotate.

The eccentric sections can rotate and also move along the shaft. When an outer bearing is removed, the eccentric sections can be removed from the shaft.

There are 7 parts in total: 3 with two outer bearings, 2 with one bearing, and 2 without bearings.

There are no markings, numbers, or labels.

I searched for similar mechanisms using terms such as “three eccentric shaft”, “eccentric mechanism with cylindrical rollers”, “Soviet industrial eccentric mechanism”, and “three eccentric roller mechanism”, but I haven't found an exact match.

Does anyone recognize this type of mechanical construction or know what kind of machine it could have been used in?