Hot answers tagged

11

Yes. Here is a study that demonstrates one way to use LEGO in ADHD counseling. If you are looking for a more rigorous outcomes-focused methodology, there's another study that looked at the impact of LEGO on social skills development in children. It found significant improvement compared to the control in a pre-test, post-test study. If your interested in ...


11

I asked Gary Istok on your behalf in this Brickset Forum thread, who is an expert on LEGO's history. He said the following: When LEGO replaced the Cellulose Acetate bricks circa 1963 with ABS plastic for non-trans parts, and polycarbonate for the trans ones, they had a problem with the red and yellow parts. For some reason (I'm not a chemical ...


6

The vast majority of lego related injuries included some variation of the following: Cutting fingers by trying to disassemble Lego Stepping on Lego (of course) Quick movement of the corner of a piece against the skin, scratching or cutting the skin Swallowing and/or choking on pieces (mostly young children, very young) Getting pieces stuck in orifices such ...


6

I can't comment on why Lego stopped selling Primo. But I can assure you that Duplo is fine for children. The smallest pieces are way too large to choke on, as far as I can tell. Small babies probably don't know how to put the pieces together very well, but that doesn't stop you from building a little house or car or something and letting them play with it.


5

There is a list of recalls dating back to 2002 on the LEGO site, so that's a start. It contains two items: A specific version of the IR remote, typically used for trains. A one piece toy truck, only sold in the USA.


5

Hello Eran's family! How are you all doing today? Please try these methods instead: The Publisher's Home Page - DON'T go directly to the search box to search the term "LEGO city mini movies", but instead just pull up one of your official LEGO mini movies and click on the name of the person who published the video to YouTube. In this case it would be "...


3

Here's an idea for a stop switch using a remote control and one's wrist. Place your wrist on the switch to start the motor. With your hands free you're still able to carefully adjust your running gears. But what if something (or someone...) gets stuck? Just lift your wrist and the motor will stop immediately. No need to quickly flick that switch on the ...


2

No, the LEGO Mindstorms EV3 is NOT waterproof. Any electronic product that is capable of being immersed in water will clearly state in the packaging/manual the level of water protection provided. This may be in the form of an IP Code: Ingress Protection Marking, classifies and rates the degree of protection provided against the intrusion (including body ...


2

At about 9 years old I fell out of bed onto a constructed set. Managed to get into my parents bed and fall asleep. In the morning the pillow was soaked with blood and I got the day off school. As far as I am aware there were no lasting side effects, but ay bleeding to the head is not considered healthy.


2

Even in early 1980s there were some patches having Cadmium. I should link to the study but lost it now. Here is somewhat proper reference: https://www.thesun.co.uk/news/5436922/second-hand-plastic-toys-including-lego-could-harm-children-with-toxic-chemicals/ Eating is something to avoid. Hand-to-mouth (hand skin licked) behaviour is not as fatal.


2

Generally for this sort of thing the recommendation is a "light machine oil" (the wording from the Hornby Maintenance sheets). These are "non-penetrating" and so won't damage the plastics which might happen with 3-in-1 or WD-40 style oils. This can often be found as "Sewing Machine Oil". Fleischmann (a model railway brand) sell ...


2

If your geartrain contains z24 gear you can substitute it with z24 clutch gear. It has built-in safety mechanism - it would slip under certain toque and as result of this it will stop transfering motion if gears placed after it would stop or get blocked.


1

Petroleum based lubricants you need to be careful with, since they can act as solvents. Zhaph mentioned non-penetrating machine oil, this sounds like a safe bet. If you are in doubt, grab a gnawed brick and submerge it in a sample for a few days and see what happens before putting it on your precious train parts. Science! Second hand info: I have heard that ...


1

While this question was asked in 2012, in late 2018 there was a flurry of inflammatory headlines and blog posts on the topic. The origin of these is a January 2018 study “Concentrations and Migratabilities of Hazardous Elements in Second-Hand Children’s Plastic toys”, in the scientific journal Environmental Science & Technology, by Andrew Turner, open ...


1

Yes heat is the ultimate problem but the most likely failure will be from the commutator brushes. As the voltage is increased so does the heat of the sparks created as the brushes pass from one commutator segment to the other. This is a particular problem on a 3 segment commutator. At 30V even if the motors can stand the mechanical loads and heat generated I ...


Only top voted, non community-wiki answers of a minimum length are eligible