Step right up for ringside revelry at Shelburne Museum’s Family Day: Circus-palooza. Parents and kids clown around at a big-top-themed bash brimming with spectacular stunts and ear-to-ear smiles. Jaws drop as daring aerialists, jugglers and stilt walkers dazzle with awe-inspiring feats. Fueled by sugary confections, mini merrymakers hit the carousel and carnival games before taking a break with a good book. In a new twist on the annual extravaganza, potential performers can preregister for the Circus Smirkus Workshop led by the troupe’s lead teacher, Joni White-Hansen, culminating in an entertaining exhibition for family and friends.