7 month old already having temper tantrums?!!

My beautiful daughter has always been an amazingly easy baby I'm truly lucky lol weeelllpp she has decided to start throwing what I call "temper tantrums " at least i think that's what is happening. She instantly get upset when she doesn't get what she wants like 0 to 100 she starts "crying" (no tears) making faces to the point where she gets red sometimes . As soon as she gets what she wants it's like a switch flips and shes happy as nothing was wrong. I don't know how to entertain her she constantly wants to be doing something I cant put her down with her toys to play anymore because as soon as I walk away she gets upset. Anyone else experiencing this ? What can I do to help the situation? I dont want me daughter to be a brat but I cant ignore her either....