Party invitation card for kids

We'll start by creating some balloons first. Create an ellipse shape in a new file. Use pastel colors.

Duplicate this layer. Apply white to transparent linear gradient and scale down a little bit. Also reduce opacity.
Change color mode of duplicate layer to screen.

Create reflections on ballon to make it more realistic. Use pen tool to create a shape as shown. Fill with white color.
Create another small shape below this shape using pen tool.
Change color mode of both shape layers to soft light.

using pen tool create lid of the balloon.

 

Select all layers. press Ctrl+E to merge these layers. Create a duplicate of this merged layer to make additional balloons. Scale or/and rotate to make this ballon a bit different from the first one.
From image menu select adjust>>hue/saturation. Apply settings as shown.

Similarly create another balloon. change its hue and rotate to the other site.

In a new layer draw hang some strings to balloons using pencil tool.
To the background layer add a nice radial gradient.
Create another layer. Apply a different gradient on this layer.
From filter menu select pixelate>>color halftone.
Change layer mode of this layer to overlay.
Type "You Are Invited" in a new layer with a fancy font.
A kids party invitation card is ready to print.