Blow up the balloon, then let it deflate to stretch out the latex/rubber.
Place the neck of a funnel into the balloon's opening, making sure it's tight or completely inserted.
Pour water beads into 1/2 teaspoon measuring spoon.
Then pour the premeasured Orbeez into the funnel. Gently shake to ensure all Orbeez are inside the balloon.Remove the funnel from the balloon.
Step 2: Add water to the balloon
Carefully stretch the neck of the balloon around a kitchen or bathroom faucet.
Place a 1/2 cup measuring cup under the balloon. Turn on the tap slowly to create a light stream of water into the balloon.Turn the tap off when the balloon fills the measuring cup.
Remove the balloon from the tap and tie a knot in the balloon, as close to the water line as possible.
Step 3: Let the Orbeez grow!
Set the balloon on its side and wait 3 - 4 hours for the Orbeez to fully expand inside the balloon.
Be sure to check in while the Orbeez are growing to see the "magic" happen! It's fun to watch the half grown Orbeez floating around inside.
Use scissors to trim the excess balloon neck, cutting just above the knot.
Have fun squishing the Orbeez around and admiring the bright colours.Your Orbeez stress ball is complete!
Video
Notes
It's best to grow the water beads inside the balloon, rather than trying to get them into the balloon after they're grown. My kids have tried it both ways and you can't get many "pre-grown" water beads into the balloon through a funnel.