Our baby will be 3 months old on Sunday. We are going through the same things. I tried the harness at first and he just plopped down like "yea- this ain't happening." He does much better with a collar. He loves to walk in between your legs though. Still working on potty training. How are you coming along with potty training? Right now- we limit him to the kitchen area bc it seems everytime we take him to any other part of the house ( that has carpet) he immediately finds a spot to potty on- even under a close eye. Although he does keep #2's for outside. -image-jpg