Cynthia's Costumes & Parties Share: Costume Rentals/Party Services Cynthia's Costumes & Parties Visit Website 1313 Laurel Street, Ste. 206 San Carlos, CA 94070 (650) 868-1459 About Map About Themed programs and party entertainment for children, costume rentals for all ages, photo ops, and MORE! Please call or email for prices, terms, and hours. What's Nearby? Distance: 5 10 15 20 25 50 mi.