Quick answer
Inflate an air-filled balloon number cake topper with a hand pump or straw, not helium, until it is firm but not stretched. Tie it off, slide the attached pick into the cake or dessert, and position the number so it stands upright. For a 15cm topper, insert the 14.5cm pick at a slight angle and keep the balloon away from direct heat.
What you need before you start
Gather the balloon topper, a hand pump or a clean straw, scissors, and a damp cloth. If you are adding the topper to a bouquet rather than a cake, have ribbon and a balloon weight ready so the arrangement stays put. Work on a flat surface and keep the balloon away from sharp cake decorations or skewers.
How to inflate and attach the topper
Slide the balloon neck over the pump nozzle or straw and inflate with short, steady bursts. Stop when the balloon feels firm but still gives slightly when pressed; overinflation can distort the number shape or pop the seam. Pinch the neck, remove the pump, and tie a tight knot close to the balloon. Then push the attached pick straight down through the centre of the cake or dessert until only the balloon sits above the surface. If the pick feels loose, insert it at a slight angle or add a small piece of cake or fondant around the base for support.
Mistakes to avoid with number balloon toppers
The most common mistake is trying to inflate an air-fill topper with helium. Air-filled toppers are not designed to float, so helium will make them rise off the pick and look uneven. Another frequent issue is inflating the balloon too full, which makes the number look stretched and can cause the pick to tilt. Finally, avoid inserting the pick into a cold or very soft cake, as the balloon may lean; let the cake come to room temperature first and use a firm base.
Step-by-step: using an air-filled balloon number topper
- Inflate with air only: Use a hand pump or clean straw to inflate the balloon to about 80–90% of its capacity. The balloon should feel firm but not tight. Checkpoint: if the number shape looks stretched or the seams are visible, let out a little air.
- Tie and secure the neck: Pinch the balloon neck and tie a tight knot as close to the balloon as possible. Trim any excess neck with scissors. Mistake to avoid: a loose knot lets air escape and the topper will droop within minutes.
- Insert the pick into the cake: Hold the balloon upright and push the attached pick straight down through the centre of the cake or dessert until the balloon sits just above the surface. Checkpoint: if the pick wobbles, insert it at a slight angle or add a small support of cake or fondant around the base.
- Position and adjust: Turn the number to face the camera or your guests. If using the topper in a bouquet, tie it to a stem or pick with ribbon. Next step: keep the finished arrangement away from direct sunlight and heat, which can soften the balloon.
Product facts
- Air-Filled Gold Balloon Number 9 Cake Topper - 15cm: Air-Filled Gold Balloon Number 9 Cake Topper is 15cm tall with a 14.5cm attached pick, supplied deflated and not meant for helium. The pick length gives you about 14.5cm of insertion depth, so it suits most standard cakes and desserts. Because it is air-fill only, you can skip helium and use a hand pump or straw.
