I knew that, however I’ve taught mobility to visually impaired people for 15 years so I should!
The blister paving at crossings isn’t braille, sorry to disappoint you. It’s a tactile warning there’s a dropped kerb, with the other part of the “L” shape leading you to the control box from the back of the pavement (if it’s been done properly)
Edit – vibrating pillows are usually a disk which vibrates when smoke alarms go off to wake them. These are for people with hearing loss 😊