The kids are in for ""tens of fun"" when Barney's friend, Mr. Tenagain, visits. His passion for all ""things 10"" leads to the reading of ""Ten, Nine, Eight"" and an account of Mr. Tenagain's trip to the moon. Snack time generates some antics in the kitchen, and a delightful picnic - visited by some rather unusual ants! Finally, Mr. Tenagain leaves surprise instructions on the ""nicest way to count to 10.