Drill - Micro contest

My participation in the Microblabla's Micro contest of August 24

Subject : Drill
Time : 3h

At first, I thought of making a simple drill. Then finally by studying the form that some drills have, I thought that in the form of toy it would be more interesting.
This is the first time I've taken part in this kind of challenge. It's very formative to want to do clean and interesting work in a limited time.