Does anyone know how splat toys work?
I saw someone demonstrating them in the local shopping centre and I was fascinated. You throw the thing on the ground and it forms a puddle. Then it reconstitutes itself spontaneously as if by magic.
I tried DDG and it seems they are actually thin plastic bags filled with soapy water but I couldn't find an explanation of how the shape is recovered. My guess is something to do with surface tension. |
I'd say the container has its already made form, so when it is deformed using liquid it is easily put back into its original from by the
https://www.youtube.com/watch?v=_1ku96ZF4kc if they only could make cars to do this. |
I think that was the wrong video. It had some fascinating toys in it but I couldn't see this one. But there was a comment there about splats saying that they have to have a "tacky" surface. So my guess about the first part of the phenomenon is that the internal pressure is low enough for the whole thing to flatten on impact and stick to the floor in its flat state for a few moments. But what pulls it back into its original shape? Is the polymer some kind of rubber?
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there was one with a monkey that the toy stuck to the wall. maybe this one,
https://www.youtube.com/watch?v=A-mkvVnpaL0 it is not to me funny like it states to be. |
You're right, it isn't funny. Anyway, people shouldn't keep monkeys or any other wild animals as pets. It isn't fair on them. And letting a monkey play with a splat ball is potentially dangerous as they are filled with detergent solution. If the ball gets punctured, you can get an eyeful of detergent. It's happened already to a couple of children.
I notice that he didn't throw the ball hard enough for it to actually splat. If you throw them onto the ground, they are usually travelling fast enough at impact to flatten out completely. |
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Ah memories. I saw the title and thought about the ones that you throw against a wall, or better, window, and they schmear down it somehow in a funny way. Gross, but like someone threw snot at it. Our first job, we had a lab with glass all around it, and "the boss" would walk slowly by various points during the day, per our conclusion, "inspection", but he likely was going to the bathroom, etc. We had several sticky toys and we'd all be working diligently, and then all at once hurl them at the glass right towards his face. Funny, ... he didn't seem to like that. |
But did they reconstruct themselves in their original shapes? That's what I found so amazing.
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My son has this pair of turds, "log" and "pile" (which have eyes and startled expression), they stick to ceilings, etc. They are a kind of a "bag" filled with what looks like a foam.
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Make splat humans.
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james corden late night did that with plexiglass. Hurl objects at the plexiglass with his guest standing behind it to see if they could not flinch. YouTube got vids if you like watching that sort of thing. |
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Kids love "gross" toys, esp. if there's added toilet humour. Sorry hazel, I do not have an explanation. I have a vague inkling why this is physically possible, and that's enough for me. |
Hello hazel. There is a cursory explanation here on the physicsfun channel ----https://www.youtube.com/watch?v=_1ku96ZF4kc
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Suddenly YouTube doesn't work for me any more. Nothing has changed since yesterday but today I get a daft message saying "Your browser does not currently recognize any of the video formats available". Well, so much the worse for YouTube! I never thought much of it anyway.
What I would like is an old-fashioned written explanation. I already looked in How Stuff Works but couldn't find anything relevant there. Is the plastic skin of these toys anything like a memory foam? |
The shell is probably a bit like that, something that starts out 'undefined' until it sets in a form, where the chemical properties change into a more persistent, rubbery state.
The filling is probably done because the material the shell is made out of would be too rigid for a full cast of it, so it's a balance between its desire to come back into its shape and having some loose liquid thing to give it the heft needed to behave the way it does. |
The liquid filler contains a strong surfactant. There have been some nasty stories about children who squeezed the toy too tightly, and the skin broke and shot a jet of the stuff right into the child's eye. Apparently it causes very severe pain and could cause permanent damage.
I've noticed that these things are sold on the street, which probably means they are cheapos from China. |
Sounds about right, and it's proably quite enticing to squeeze it, too.
Entices the child to squeeze it because the goo inside strains against the rubber, but not designed to be a toy of that kind, like a stress ball. I remember those snot like things, too, they collected lint like crazy, but at the very least they were their own whole package. They should just bring those back, but then again, 'slime' had some chemical in it, too (not that the 'snot' stuff was slimy per se). So who knows. Damn chemicals. Oobleck balloons would be a solution, if its properties were inverted...but, alas. |
This is the brief text of that youtube page I posted
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"Are your splat balls safe for children?
Yes, our splats contain only filtered water so they’re the safest available. They’ve been tested, meet US regulations, and are perfectly safe. Most company’s splats aren’t tested and contain lead and phthalate levels that do no comply to US toy standards and regulations (it’s illegal for them to sell them, but it is so easy to get them into the country since no one is policing it). We continually change our splat recipe to meet or exceed changing safety standards. We spend 30% more than our competitors to make our splats so they are safe for your children. The water in our splats, unlike most of our competitors, is safe enough to drink (I don’t suggest it, though" https://www.splatback.com/faqs/ If it only contains filtered water then how do they change the recipe? Maybe the outside is a recipe? |
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