Tu B'Shvat is the Jewish holiday known as the Birthday of the Trees, kind of like the American Arbor Day. In Israel, it is a time when school children go out into the country side and plant new seedlings every year. People also have a festive meal, called a Seder (just like at Passover), that includes eating from the "seven species," seven fruits and grains that are native to Israel and celebrated with thanks at this holiday. Tu B'Shvat is a winter holiday in North America, usually falling in late January-mid February (the 15th of the Jewish month of Shevat).
This song lists these seven species in Hebrew and in English and teaches a bit about what they represent.
It is an easy song for children to participate in as there is an echoing clap following each species.