What's a cosmic skate?

Northbrook residents can find out by attending Friday night's inaugural Fun4All.

The skating and swimming event will be from 6 to 9 p.m. at the Northbrook Sports Center, 1730 Pfingsten Rd.

Open swim and a cosmic skate will be from 6 to 9 p.m. Pizza will be served from 6 to 7:30 p.m.

The cost will be $10 if you register before Friday. Registration will be $15 at the door.

All proceeds will benefit Northbrook's Fourth of July festivities.

To register, visit the Sports Center or call 847-291-2993 or come to the Leisure Center, 3323 Walters Ave., or call 847-291-2995.

You can also register online at nbparks.org, enter the code 6574 on the event line.

Click here to find out more about this year's Fourth of July celebration.