Hi @maijin658 , Welcome to the forum!
If you have a servo motor or regular motor that you can easily connect to the micro:bit, you can probably get it to vibrate some by moving the servo/motor back-and-forth quickly.
There are a few kits that include vibration motors or haptic feedback, like:
Here’s an instructable that shows one way to connect a vibrating motor to the micro:bit: https://www.instructables.com/CalmCuff/ HOWEVER, the micro:bit isn’t able to supply enough current to activate many motors in this way. It may not work or not work well. Many micro:bit electronic kits include a transistor to control a motor, which is usually more reliable.
Here’s a previous forum post about this sort of topic too: Make Micro:bit vibrate remotely - #2 by bsiever
Good luck on the project!