[Karibou]

Training and fundraising usually bring teams together pretty well in the off-seasons. Both definitely need to happen, so why not use both activities to keep kids engaged? Instead of, say, having kids go out and sell HexBugs to their friends and family on their own, get them to bake things and sell them at a local market, where they can interact with each other. New recruits will learn about the team very quickly when people ask about the team, and the veteran students respond with similar information each time. And since you're still a pretty new team, there isn't any extensive history that the new students would need to know in order to explain what the team has done.

I would also suggest including some generally fun events to bring the team together; ones that have nothing to do with the robot. Go out and play Laser Tag. Have a LAN party in someone's basement. Play a game of baseball at a local park. Volunteer for Habitat for Humanity. It's things like these that will forge friendships that don't just exist at robotics meetings, but during the school day as well.