Here is a project from Adafruit that shows you how to make a creepy animatronic crawling hand using servos and a Circuit Playground Express. This hand pulls itself along the floor slowly until it finds a dark, cold spot.
You may also want to see:
You are going to need 2 Eccentric Hub for TT Motors, 1 high torque metal gear servo, 1 x 2500 mAh battery, and a bunch of simple tools to pull this off.
**Disclaimer: Our posts may feature aff links. As an Amazon Associate, we earn from qualifying purchases. Please read our disclaimer on how we fund this site.