There are Easy that are enjoyable to play.
Before you start exploring though, it may be a good idea to master some basic techniques and then you can start experimenting with other types of music.
Twinkle, Twinkle, Little Star, Mary Had a Little Lamb, Chopsticks, Ode to Joy, and Jingle Bells are some best for children to learn.
Classical Virtual Piano Songs for Beginners -
Row, Row, Row Your Boat
Mary Had a Little Lamb - Great children's song that is easy to learn.
Skip to My Lou
For He's a Jolly Good Fellow
Happy Birthday - An easy song to play and one that can come in handy at birthday parties.
These Popular are all great for the absolute beginner.They are all either Children's Songs or Traditional Songs so many of them should be familiar to you.
Patience is a key factor in your piano practicing and it will pay off if you apply it properly and regularly.
Learning music is a discipline and you need to treat it as such. Try to practice the same days and at the same time as much as possible, this will help you to develop a good practice routine and see positive results faster.