It was super simple and super cheap! I found dehydrated Elderberries at the health food store for $3.50 for the bag you see and that's after making a batch.
Homemade Elderberry Syrup
Put a 1/2 cup dehydrated or 1 cup fresh elderberries in a pot and cover with 3 cups of water. Bring to a boil and simmer for 30 minutes. Pour through a strainer and smash the berries (I just used the bottom of a coffee cup). Add 1 cup of honey to the liquid and store in your refrigerator. DONE! It says it keeps for a few months. You can take it as a maintenance or prevenative of 2tsp a day for kids 4-adult, 1tsp 1-3 year olds. When sick you can take that dose every 2-3 hours. Some places it recommended adding it to hot water for the younger children to kill anything in the honey.
It's not bad tasting, some people even use it on their pancakes instead of maple syrup. I can say it's the first time I've had a croupy kid in the morning that didn't end up having a long night to follow in and out of a steamy bathroom.
We may see if we can grow it next year and then freeze or dehydrate the berries. Sounds like a good homeschool project!
Whether you buy it or make it, definitely worth a try this cold and flu season.