Diddams Party & Toy Store – Party Supplies, Toys, Costumes

Diddams Party and Toy Store is your one-stop shop for party supplies, balloons, custom banners, costumes, toys, candy, custom t-shirts, catering supplies, and so much more! We offer a wide variety of custom services to help you throw a unique and memorable celebration.

Our Custom Balloon Decor is unlike anything you’ve ever seen! Diddams offers custom balloon decor for large parties and events. We also have in-store print services for banners and t-shirts. Contact Diddams Party & Toy for details and pricing.

Helping you throw your best party

“Established in 1989, Diddams Party & Toy Store is the largest, family-owned and operated party store in the Bay Area. We carry a huge selection of party supplies, toys, balloons, custom banners, custom t-shirts, candy, and costumes, plus specialty and hard-to-find items. Since we carry a variety of items from a large list of vendors, we’re able to bring you unique items that you won’t find elsewhere.”

free plates and napkinsWant FREE plates and napkins every month for an entire year?

Sign up for the Diddams Loyalty Club and you’ll receive a coupon (emailed to you each month), for 1 FREE package of plates, and 1 FREE package of napkins. You can even choose from any birthday or baby design we sell!


Store Locations

We’ve got Diddams Party & Toy Store locations in San Jose, Mountain View, San Carlos, San Mateo, and Daly City. Find us here!