Yarn Eggs. 1. Inflate a small balloon to desired size and tie the end off. Another brilliant idea is to insert a small chocolate, trinket or note before you tie off the balloon. 2. Soak the yarn, wool or cotton in a mixture of 50% craft glue and 50% water. 3. Wrap the yarn around the balloon and set aside to dry. 4. Pop and remove the balloon once the yarn has dried and set. 5. String up eggs to decorate windows or doorways. Click for more great Easter activities for upper primary grades.