AITA for not taking anything from my Niece's goody bag? I am 4 and she is 7

I (4f) went to my friends house to play. His sister (7f) had her birthday party two weeks ago. She had goody bags for everyone that attended and she had some extra goody bags. My friends Mom said I could take one. <br>Inside was some candy and a big barbie doll. I love barbie dolls but dont really like candy. I told her sister I only wanted the barbie but she didnt want me to have it and said I had to take everything if I wanted the Barbie. She is 3 years older than me so she told me no and I had to do what she said. <br><br>She ran to her Mom and told her I only wanted the barbie. Her Mom said I only have to take everything if I wanted the Barbie. I told her that I dont like candy and only wanted the Barbie and she let me take only the Barbie.<br><br>My niece went to her room and wouldnt play with me . When my Mom came to pick me up she yelled at my Mom for not teaching me manners. She said I was spoiled for only picking out whats good from the goody bag and not taking everything like I was suppose to.<br><br>Now my Mom is mad at me for not taking everything. Was I wrong for only taking the Barbie?