DIY (Do it Yourself) vibroegg. You need only 3D-Printer, micro 130 motor and USB-cable
It can be water resistant if you will use hot glue for usb-cable connect and water resistant glue for assemble both parts.
This vibroegg small and strong, easy to assemble and use!
Can printed by using any material (I used PLA)
You must use an electric tape for smooth sound and make vibration stronger.