There are many factors to consider when choosing a preschool for your child.  (For more on that, see here).  In the meantime, here's a list of Jewish preschools in brownstone Brooklyn.

Brooklyn Heights Synagogue Preschool (Reform)

Brooklyn Heights Map It 
Ages:
2-4 years, but also offers programs for younger children with parents
Days/Time: Two-year-olds and some young three-year-olds attend school either 2 days or 3 days a week from 9am-12pm. Three-year-olds attend school 5 days a week from 9am-12pm. Four-year-olds attend school 5 days a week from 9am-2pm, with a noon dismissal on Fridays.
Apply: Information sessions and tours of the school are held in the fall and early winter for admission for the following school year.  Applications are distributed at the information sessions.
preschool@bhsbrooklyn.org
     718-522-2070

Kiddie Korner Preschool (Orthodox)  

Brooklyn Heights Map It    
Ages:
Infants-5 years
Days/Time: Choice of three, four, or five days from 9am-12pm, 9am-2:50pm, or 8am-6pm
Tuition: Ranges from $8,800 to $20,800
Apply: Application form on website. $100 application fee.
director@kiddiekorner.org
     718-596-4840   

Kane Street Early Childhood and Family Center (Conservative)

Cobble Hill Map It
Ages: 2-4 years
Days/Time: Two days (T,Th); Three days (M,W,F); Five days (M-F). Choice of half days (9am-12pm); full days (9am-4pm); extended days (8am-6 pm).
Tuition: Ranges from $5,480 to $17,890
Apply: Applications for September admission are due by second week of January. Small group tours given on Tuesdays and Thursdays beginning in October.
peggy@kanestreet.org     718-875-1550 x 2

Chai Tots Preschool (Orthodox)

Park Slope Map It & Prospect Heights Map It    
Ages:
18 months-5 years
Days/Time: 18 months-4 years have choice of two, three, or five day program, full or half day; 4 years-5 years is five full days only.
Tuition: Ranges from $4,750 to $12,100
Apply: Apply by end of December to recieve notification by February; applications received from January and later will recieve notification on "first come first serve basis." $200 application fee.
Email Form     718-499-0836    

Congregation Beth Elohim Early Childhood Center (Reform)

Park Slope Map It
Ages:
2.5-5 years, but also offers programs for younger children with parent
Apply: Applications available in early November for following school year.
jisrael@cbebk.org     718-499-6208

Luria Academy Primary Education (Open Orthodox)

Prospect Heights Map It
Ages: 2-5 years
Days/Time: Full time; Part-Time (M-Th 9am-12, F 9-1); 3 Full Days; 3 Part Days (M-Th 9am-12); 2 Full Days; 2 Part Days (9am-12)
Tuition: Ranges from $9,100 to $17,500; Financial Aid is available
Apply: Application available on website. $100 application fee. 
avery@luria-academy.org     718-398-3290

Union Temple Preschool (Reform)

Prospect Heights Map It
Ages: 2-4 years
Days/Time: Morning program; extended days are available four afternoons a week for 3-4 year olds
uniontemple@uniontemple.org     718-623-1322

Oranim Daycare (Non-denominational)

Windsor Terrace Map It
Ages: 18 months-4 years
oranimdaycare@yahoo.com     347-267-4179