This craft is great and easy for children of all ages. Create a glue mixture using 1/4 cup of cornstarch and 1/2 cup of water in a saucepan. Stir until the mixture is smooth then heat the mixture over medium heat until it is thick and translucent. Remove from the heat and allow it to cool to the touch. This mixture can be stored in the fridge for a week. If it gets too gelatinous, then stir in 1/4 cup of hot water.
Cut yarn into pieces of about a foot long. Use a cookie cutter to create a desired shape or you can free form it but cookie cutters are great ideas for smaller children. Put the cookie cutter down on the shiny side of parchment paper. Have your child coat a piece of yarn in the cornstarch glue so it is coated. Run the yarn through their thumb and forefinger to remove excess glue and then place the yarn inside the cookie cutter. Repeat this process until the cookie cutter has a thin layer of yarn throughout the entire shape. Clean hands then come back and push the yarn flat.
Gently remove the cookie cutter (this is probably best for an adult to help small children with) and allow the yarn ornament at least a day to dry completely. If you need to speed up the drying process you can place the parchment paper and ornaments directly into the oven set on "warm" for an hour or two.
You can use these for many different occassions. Use red, white and pink yarn and a heart-shaped cookie cutter for Valentine's Day. Green yarn with a christmas tree cookie cutter can be used for Christmas. This can also be used for mother's day, birthdays, or even general decoration.