• The 3,000-square-foot 9/11 Memorial Preview has opened at 20 Vesey St., across Church from the northeast corner of the World Trade Center site. The mood inside was solemn and respectful, and the storefront appeared an appropriate temporary solution to the question of what to do with all the visitors. There’s a video, a timeline, touchscreens, a model of the new development, and a substantial shop selling books, mugs, T-shirts, and NYPD and NYFD memorabilia. The shop may give some locals the creeps, but (a) proceeds go to “developing and sustaining the National 9/11 Memorial & Museum,” and (b) perhaps some of the many vendors in the area will go back to selling I Heart NY shirts. It’s open Mon.– Wed. and Fri.–Sat. (10 a.m.–7 p.m.), Thurs. (10 a.m.–9 p.m.), and Sunday (10 a.m. to 6 p.m.).

• Gymboree Play & Music, which specializes in classes and activities for kids up to age 5, is taking over the MiniMasters space on Reade (Church/Broadway). Classes are due to start Sept. 14. For info call 877-496-5327 or go to gymboreeclasses.com.

• Downtown Express has profiles up for three of the five candidates for City Council District 1: Margaret Chin, Alan Gerson, and Pete Gleason. Still to come: Arthur Gregory and Democrat-come-lately P.J. Kim.

• Enrique Norton, architect of One York, the big new half-white building at Sixth Ave. and Laight, has put his apartment on the market for $1.995 million, says Curbed.