Just a list. Not necessarily in this combination.
Hallelujah! Party in a box:
Amanda Jane Jones's grown up versions of Party in a Box - courtesy of Oh Happy Day!
Acme Party Box Collection
Make it Mine Parties
All about (oversized) balloons at Design Mom
Dinosaurs at Wants & Wishes - active volcano cakes (recipe here!)
Zubbles - coloured bubbles
Origami lidded boxes by Dave Brill
A message in a whiffle ball, perhaps?
Inflatable Beach Balls by Silke Stoddard over at the Crafts Department - perfect if the ball idée fixe sticks around.
Paper Airplane Garland at Armelle - I'd like to see a room-spanning garland like this!
Huge Balloons with streamers from Geronimo! - expensive
Felt Balls from YUMMI Shop - there must be a use for these!
Re-nest's Newspaper Pom Poms
Jordan Ferney's Frilly Streamers at Oh Happy Day!
Origami Waterballs for a Garland at The Hurried Housewife
Tissue Pom Poms by Prost to the Host
DIY Tissue Pom Poms at Martha Stewart
Paper Lollies by Make and Takes
Tissue Paper Garland at Prudent Baby
Fabric Pennants at Form and Reform
Ruffled Streamers at My Paper Crane
Pennant Cupcake Toppers at Fog and Thistle
DIY Molded crayons and glitter crayons at Mini Eco
Chalkboards by Making It Lovely - she suggests them for New Year's Resolutions.
Molded Crayons from Lil Doodlers
DIY Scratchers at ArtMind - just remember: detergent + metallic paint!
DIY Animal Crackers and Bags at Celebrate Creativity
Superhero lollipops at Zakka Life.
Traditional Medallions by Twig & Thistle
Mod Medallions by Alissia Melka-Teichroew
Match Boxes at The Storque
Toys on top of cupcakes = Party favours and toppers
Martha's Bouncy Ball Party Favours
Black Dinah Chocolatiers Froglets
Molten Chocolate volcano cakes recipe at Wants and Wishes
Cupcake topper pennants like these at Oh Happy Day
Cupcakes in a Jar at Cakies - a bit mooshed looking ... hmmm. Might rethink the presentation (i.e., shorter jar, no layers?)
Planetary Cake Pops by Paper, Plate, and Plane - Marbelizing Candy at Wilton.
Inarizushi at Ready-Made
Chirashi by Tea and Cookies
Red Velvet [Cup]Cakes
Poof Balls at Tops Malibu, courtesy of Oh Happy Day
Dinosaur Egg Hunt at Wants & Wishes - eat the "eggs" afterward!
Balloons in boxes and out the window at On-Hand + Modern