Saturday

Rock pioneers

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Rockabilly Days; A Tribute to the Very First Hits of Rock 'n' Roll

, performed by the Rivers Rockabilly Trio will be presented at 8 p.m. Saturday at the Colonial Theatre, 227 Bridge St., Phoenixville. Artists such as Bill Haley, Carl Perkins and Elvis Presley laid the groundwork for "rockabilly," a musical style that combined country and rhythm and blues with undertones of gospel and jazz. Tickets: $12.50 in advance, $15 day of the show. Group rates available. Information:

or 610-917-1228.

Saturday-Sunday

Tipping over

The Tipping Point

by Jodi Netzer and the Conscious Collective, is a multi-disciplinary dance and physical theatre performance plus an interactive public forum offered this weekend. Organizers said it is designed to demystify the process of creating successful environmental, cultural, political and highly spirited movements. The presentations are at 7 p.m. at the Community Education Center, 3500 Lancaster Ave., with a pay-what-you-can sliding scale of $10-$25. Information:

or 267-334-7857.

Starts Today

Sizzling summer

Every Friday through Labor Day, the National Constitution Center will host days of summer fun, allowing visitors to make crafts and to play games from various periods throughout history. From 10 a.m. to 3 p.m. today and on Fridays through June the focus is on the 1700s, with hoop-rolling races and other colonial games. Visitors also can make "bilbo catchers" (a cup and ball toy), quill pens, and candles. July will focus on activities from 1860 to 1890. Visitors can play parlor games, try on hoop skirts and pantaloons, and learn how to host a tea party. Admission is free with museum admission. Information:

or 215-409-6700.

Today-Sunday

Wizards and comics

Katee Sackhoff, the actress who portrays Kara "Starbuck" Thrace on

Battlestar Galactica

, is scheduled to appear Sunday at Wizard World Philadelphia, which opens today. Sackhoff will meet fans and sign autographs during her appearance at the Convention Center, 12th and Arch Streets. For a complete list of events, registration forms, guests, panels, ticket prices, and times, go to

.