Children should generally avoid drinking decaf coffee due to its minimal nutritional value and the potential risks associated with caffeine consumption at a young age even at the low amount.  However, some experts say decaf coffee is generally considered safe for children in moderation, but it's not typically recommended for several reasons:

1. Caffeine Sensitivity: While decaf coffee contains significantly less caffeine than regular coffee, it still contains a small amount of caffeine. Some children may be sensitive to caffeine, experiencing side effects such as increased heart rate, jitteriness, or difficulty sleeping, even with decaf coffee.

2. Nutritional Value: Coffee, including decaf coffee, does not provide significant nutritional benefits for children. Instead, children should primarily consume water, milk, and other healthy beverages to support their growth and development.

3. Developmental Considerations: Children's bodies and brains are still developing, and caffeine can have different effects on children than on adults. Excessive caffeine consumption in children may interfere with sleep, hydration, and overall health.

4. Acquired Taste: Coffee has a strong and often bitter flavor that may not be appealing to children. Introducing young children to coffee, even decaf, may develop a taste preference for caffeinated beverages later in life.

5. Other Beverage Options: Children have plenty of other beverage options that are more suitable for their age and nutritional needs, such as water, milk, herbal teas, and fruit juices (in moderation).

In summary, while decaf coffee is unlikely to cause harm in small amounts, it's generally best to limit children's consumption of coffee, including decaf, and encourage them to drink beverages that better support their growth and development. If you have concerns about your child's caffeine consumption or dietary choices, it's always a good idea to consult with a pediatrician or healthcare provider.

P.S. If you would like to learn more about this subject check our sources below.

1. American Academy of Pediatrics - "Healthy Drinks for Kids" - This resource provides guidance on suitable beverages for children and emphasizes the importance of water, milk, and limited consumption of caffeine-containing beverages: https://www.healthychildren.org/English/healthy-living/nutrition/Pages/Healthy-Beverages-for-Kids.aspx

2. Mayo Clinic - "Decaf Coffee: How Much Caffeine is in It?" - This article explains that while decaf coffee contains less caffeine than regular coffee, it still contains a small amount, which may not be suitable for children: https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/decaf-coffee/faq-20058319

3. Harvard T.H. Chan School of Public Health - "Kids and Caffeine: How Much is Too Much?" - This resource discusses the potential risks of caffeine consumption in children and recommends limiting their intake: https://www.hsph.harvard.edu/nutritionsource/2016/09/21/kids-and-caffeine-how-much-is-too-much/

4. Centers for Disease Control and Prevention (CDC) - "Caffeine and Children" - This page provides information on caffeine consumption in children, including potential side effects and recommendations for limiting intake: https://www.cdc.gov/nutrition/infantandtoddlernutrition/foods-and-drinks/caffeine.html

These sources offer expert advice and evidence-based recommendations regarding caffeine consumption in children, including decaf coffee. It's important to consult reputable sources and healthcare professionals for guidance on children's dietary choices and caffeine intake.