TimexTIME Machines® 29mm Blue/Yellow Stripe Elastic Fabric Kids Watch

What makes it a boys watch?

How long will the battery last?

My 2 year old son wear my wrist watches. I want to buy something suitable for his age. May it be a solution, or they are too big for him?

Is the buckle and the back of the case made of stainless steel? My son has sensitive skin so I need to verify the metal type.