Punctured Woofer

My little 4 year old used my martin-logan aerius woofer as a pincushion and put three 3mm sized holes in the cone. If I can get to them (don't know how yet) are they repairable by me. Is there a role for duct tape in this? Or do they go back to the factory for replacement? They have developed a mild rattling buzz where the holes are.
Thanks for any ideas