Overview
Young Performers Theatre (YPT) is the only full-time children's theater in the Bay Area, operating out of Southside Theatre in Building D at Fort Mason since 1983. What makes it worth the trip is the casting: almost every performer on stage is between 8 and 18 years old, which does something interesting to a young audience. Kids watch kids deliver full productions of classic fairy tales and children's stories, and the effect of seeing people only a few years older than them hold a stage tends to land differently than a professional adult cast. Shows run roughly 45–60 minutes with no intermission, which is well-calibrated for the 3–8 age range.

How to Do It
Fort Mason is in the Marina at 2 Marina Boulevard, accessible from the Bay and Buchanan Street intersection. By car, there is a free surface lot outside the Fort Mason gate on Marina Boulevard, but it fills during large events at the complex — check the Fort Mason events calendar before you go if parking matters. The paid lot inside the gate (fees from 7am–midnight daily) gives you more options. Muni lines 28, 30, 30X, 43, and 49 serve the area; the 28 and 43 run along Marina Boulevard itself.
Once inside Fort Mason, Southside Theatre is in Landmark Building D. Some older listings still show the address as Building C, third floor, which is where YPT's administrative offices were previously located — the performance space is Building D (Southside Theatre). Head toward the waterfront-facing buildings and look for signage to Southside Theatre. Building D is on the south side of the Fort Mason complex. First-timers should add five minutes to navigate the campus, especially if you're not familiar with Fort Mason's building layout. The view of the Bay from the grounds on the way in is worth arriving a few minutes early for.
Tips & Tricks
The house is small. Every seat in Southside Theatre puts you close to the stage — there's no bad seat, but there's also no significant visual buffer between the audience and the action. For a child who is tentative about live theater, this intimacy is actually an asset: the scale is nothing like a professional downtown venue, and the performers are visibly kids just like them. That said, if your child tends to get anxious in crowds or new spaces, walk them through what to expect beforehand.
YPT presents five shows per season (September through June), plus one Shakespeare production featuring their older players. The repertory model means productions rotate, and a different title is on stage every few weeks. Check ypt.org before you go to see what's running — the current show matters for matching the story to your child's interests. Tickets are $15 in advance online and $12 at the door, so buying ahead saves a few dollars and guarantees your seat.
Birthday party bookings are a real option here and well-reviewed by SF families. YPT offers packages where the birthday child is acknowledged onstage by the cast, followed by a private party space. Reviews specifically call out the staff handling of birthday logistics as smooth and low-stress. If you're considering this, book well ahead — the venue is small and birthday slots go.
The audience skews young and the house is forgiving of kid behavior. Toddlers who squirm or whisper-question throughout the show are not going to disrupt anyone. If you have a child who won't sit still for 60 minutes, YPT is a much lower-stakes first theater experience than, say, the SF Symphony's family series. That said, shows start on time and late entry is disruptive given the room size.

Planning
Tickets are $15 in advance, $12 at the door. No additional fees for kids or seniors. Groups can contact YPT directly at (415) 346-5550 for group rates. Birthday party packages are priced separately; call or email for current rates.
The season runs September through June with five children's productions plus one Shakespeare show. Summer months (July–August) are class and camp programming, not repertory performances. The best months for catching a show fall in fall and winter, when the schedule is fullest. Performances typically run weekends; specific day and time vary by production, so confirm on ypt.org.
No stroller storage is mentioned, but the venue is listed as stroller accessible. Arrive 10–15 minutes early to park on campus, locate Building D, and get settled before showtime. What to bring is minimal: tickets (print or phone), a light layer since Fort Mason buildings run cool, and any snacks your child needs. No food is sold at the theater, though Fort Mason has a cafe on premises. The surrounding Marina neighborhood has excellent post-show lunch options a short walk away on Chestnut Street.
Best ages are 3–8 across the board, with 3–5-year-olds landing especially well in the shorter productions — the 45–60 minute runtime doesn't test their patience the way a 90-minute show would. Children who are already into reading and stories will get the most out of the narrative material; the productions draw from familiar source material (fairy tales, classic children's literature) so kids usually recognize the story even if they're new to seeing it staged.