Magic marker

You will need:
1) Reed switch - This is a glass tube with contacts. When you bring a magnet to the reed switch, it closes the contacts. You can get it by disassembling the reed switch; there are also reed switches in door closing sensors for alarms, etc.
2) vibration motor from a broken mobile phone.
3) Small diameter battery. In order not to reinvent the wheel with a crown, I suggest just buying a “pinion” battery.
4) Small magnet.
5) Marker
6) And so on . . .