“MindLink Smart Headset Brainwave Sensor Head Band is an affordable and portable Brain-Computer Interface Headset that builds a wireless connection between the human brain and devices such as smart phones and tablets. Unlike any mainstream medical brainwave sensing devices that require several wet electrodes, MindLink only requires a single point of contact using a dry, metal sensor on the user’s forehead and it can accurately detect brainwave function:”

https://www.aliexpress.com/item/4000460287609.html?spm=a2g0x.12057483.detail.3.1a6c2671pth9fY

“Spider robot needs to be activated by the childerns concentration, relieving brain pressure. Can also be used in the training of athletes and ADHD treatments”.

The effectiveness of this device has not yet been scientifically confirmed.

Spider Robot EEG devices have been developed before by OpenBCI: