I also hope you have as much fun at swimming as we do. We also started in the 4-6 month class. It was probably closer to 5 months after the Christmas shutdown and bub's vaccination. Bub took to it really quickly. Within a few weeks he started going bananas, even at home, when he would hear the fun songs from his swimming class. Even now there are certain songs from swimming we use to distract him when he's upset about something.