Party Supplies & Rental Store Party Plaza is your one-stop shop for all Party Supplies in Glendale CA. Party Plaza has a large selection of party supplies for all your occasions: Kids birthdays, Adult birthday, Baby shower, Bridal shower, Wedding, anniversary, Bachelorette party and more. One stop Party supplies and rental store in San Fernando Valley. We have Balloons for sale and decoration, Helium tanks rental, Party rental, Jumpers and D.J Equipment rentals. Affordable party supplies, ba