Will you give pen to lo at age of 16month old ? My mil keep on giving lo pen and I am not happy with it

As much as i don't like to give them pen (they will draw on walls and everything!) My LO likes to reach out for pens as they notice mummy are always using that pen. I bring them to my office with me. So what i do is, i teach them the proper way of handling a pen. No swinging, no throwing. It's painful when you accidentally hit someone with it. Simple rules but let them know. They will be able to understand for sure.