CALL 

Mountain View

650-965-0138

San Mateo

650-235-8448

San Carlos

650-802-0600

Custom Balloon Decor

650-804-4602

GET A BALLOON QUOTE

Get an instant balloon quote from Lisa!


It's never too late to order your balloons.

We ❤️ pulling off last minute miracles!

If you need less than a dozen balloons, no need to order ahead of time. Just come on in and we'll get you what you need.

Ridiculously Affordable

Balloons Ready Super Fast

Delivery Available

Everything you need to create an extraordinary costume

Our stock is so huge, we couldn’t possibly show all of them to you right here!

Come on into our store or call to see if we have what you're looking for.


Year Round Stock

Don’t wait for Halloween to have a great time dressing up as your favorite character! We are the largest, year-round costume shop in the area.

Great Costume Selections

Superheroes, famous people, animals, fairies, and more. Walk through the isles for inspirations and let us help you bring them to life.

Wigs, Accessories and Makeup

Get the perfect look with wigs, masks, makeup, and props like fake blood, fake teeth, and costume jewelry. The options are endless.

If Diddams doesn't have it, nobody does.

We have everything you need to make your celebration extraordinary.

Mountain View

1952 W El Camino Real

Mountain View, CA 94040

650-965-0138

Sun-Sat: 10AM - 5PM

San Carlos

700 Laurel St

San Carlos, CA 94070

650-802-0600

Sun-Sat: 10AM - 5PM

San Mateo

1940 El Camino Real

San Mateo, CA 94403

650-235-8448

Sun-Sat: 10AM - 5PM

We believe party planning should be fun and easy!

3 Easy Ways to Make your Celebration Memorable 

on Any Budget

Learn how to:

  • Get organized
  • Plan with ease
  • Enjoy your own party