"My name is Albertson"

Today Tyler made a cool art room with art supplies, tables, and Hannah, Nathan, Emma, Tyler and I are in it. Emma thought it was some sort of game so she said to Tyler "Teacher, my name in the games is Albertson". Tyler thought she meant some real name like Addison or something, so he didn't realize much, then when he called her Addison she said her name was Albertson. Then later today she said "Actually you can call me Lemon" where do they get this stuff?