Worcester Polytechnic Institute will again host BattleCry, “the best off-season FIRST Robotics competition,” this year on July 31 and August 1, with up to 24 teams competing each day. Newton’s high-school robotics team, the Ligerbots, will complete on August 1. The event is not open to the public but will be live-streamed at https://twitch.tv/wpirobotics. If you’re fully vaccinated, you can apply to volunteer.