Let it snow as soon as you send out invitations for your child's winter birthday party. Choose from options such as those with pale blue paper, snowflake designs or mitten-shaped cards. Consider these tips to add a chilly touch to invitations.Use a snowflake-shaped paper punch, found at crafts stores, to make snow for handmade invitations.Glue paper snowflakes together and write a piece of party information on each one.Put fake snow into envelopes of any invitation for a snowy surprise.