“あそびうた”, Asobi Uta, means songs that you can “play” with, meaning there are actions that go along with the words. Many Japanese children learn these songs at their preschools. My two kids really enjoy these songs and it is a great time-filler activity when they’re waiting for dinner, standing in line, etc.
A company called HiHiRecords has made some wonderful Asobi-uta videos. If you don’t already know these songs, I encourage you to learn them with your children!