What you'll need:
3" Flower pot
Small flowers, 5-8 for each
1 Plastic fork for each
Plaster of Paris

How to make it:
Spray paint the pot, or leave it plain.
Mix the plaster according to the directions on the box. Let it set for a bit and cover the table ( if your plaster is to runny it will leak out of the hole in the bottom).

When it's stiff (but still runny enough ) pour into the pot.
Put in a small batch of moss and poke in the flowers.
Then put the fork in the middle of this.
Let the plaster dry for about 6-12 hours.