Summer will be over before we know it, and while it’s impossible to make time stand still, turning back the clock is a whole different matter. The annual Vermont History Expo is a gateway to the days of buggies and bonnets, homespun clothes and hearthside stories. More than 150 historical organizations from around the state provide portals into the past with exhibits and lectures, and musicians, crafters and artisans bring the sights and sounds of yore to the fore. The time travel continues with heirloom animal breed exhibits and talks by authors and genealogists, all of which make for an experience as educational as it is enticing.