All four DVDs are not trial versions, but were sent to regular members. English course for 3-4 year olds Kodomo Challenge Hopp English [2019-2020 edition] May, July, November, and January DVD My daughter started watching these DVDs when she was just under 2 years old, and now at 5, her pronunciation is so good that her parents can't imitate it. All have been tested and confirmed to work. Please use them to help your child learn English. #KodomoChallenge #KodomoChallenge #English #HoppEnglish #EnglishDVD #Shimajiro