Bay seniors harboring serious concerns about America’s ability to innovate are invited to the San Mateo County Events Center this weekend for the annual Maker’s Faire (don’t ask me why they spell their name in Middle English). 900 exhibits showcase the DIY skills of hugely imaginative techies. There’s a robotics competition, drone games, hacker races, even a human-sized mousetrap, as well as classes in soldering and lock picking. Adult tickets are $30 in advance for a one-day pass. A great adventure to share with your brilliant grandchildren. Kids $27 to $39.