I have two in the same mouthing phase although if I let the one have his soother and suckky cloth bunny thing he mostly uses that which is almost grosser when he leaves it laying around. They are 13 and 14 months. I have a dish of baby teething toys, a few plastic jar lids, etc that are ok to mouth. I keep moving them to this bucket to get something from to chew. I take away what they are chewing on and then pick them up and move them to the chewy bucket. They generally scream in indignation but do pick something from the bin so it lasts for awhile. My hope is that with time they will get so used to chewing stuff out of there and that when they get a bit older but haven't given up the habit they will better understand when I use just words to redirect them - I can dream anyways.