Help !?

🌹Jenni🍀 • 🌸Jenni💐Mother of 4 Earth Babies🌿n. Mccc czdsr i

My 6 year old is one of the most ungrateful children I’ve ever met. I bought her a tablet for Christmas along with a few other items & she threw a fit that she didn’t have as many presents as her one year old sister. (Keep in mind, I got her sister a couple of baby dolls and a few 6-18m toys that were less than 8$ each.) Then she saw her birthday present. (Her birthday is in three weeks) She threw a huge fit because it’s only 2 toys. (I got her exactly what she asked for.) She screamed “only two presents?! I want more than two!” out in public. I was so embarrassed. She also threw a fit coz her tablet wasn’t a Kindle Fire like her 4 year old sisters was. I got the kids fire tablet for 49$. Her tablet costed me 129$. I guess my point is, how do I deal with her being this way? I give her more than my parents ever got me. I pay all my bills too. I’m just looking for advice on how anyone deals with this narcissistic behavior with their kids? (I’m not looking for criticism for buying a tablet for Christmas. It’s a Leap Tablet Elite.)