Here's a poem for you to use in your party invitation:

A SNO-PARTY We're so excited
You're my friend, so you're invited!
Wear long pants, way past your knees.
And bring some gloves, so you won't freeze.

We'll build a sno-man, wait and see,
He'll be as big as you and me!
A snowball fight is so much fun,
Tons of fun for everyone.

Then red and yellow, green and blue,
A sno-cone is real sweet to do.
So come on over, we can't wait,
A REAL COOL WAY TO CELEBRATE.