The New England Center for Circus Arts beckons folks to step right up to the inaugural Vermont Circus Festival in Brattleboro — a vibrant weeklong takeover featuring pop-up activities, performances, exhibits and workshops. More than 200 participants flood the town’s streets and venues with aerial feats, acrobatics, miming and clowning. Not to be missed is a “Clowns on Ice” show at Nelson Withington Skating Facility, a “200 Years of Circus in Vermont” history presentation with Circus Smirkus founder Rob Mermin, three unique shows at NECCA’s Trapezium and a kooky “Clown Crawl” in conjunction with Brattleboro’s monthly Gallery Walk.