DD is 21mo and has recently started hitting and throwing. She mostly hits DH and I when we're picking her up when she doesn't want us to or putting her in the car. Sometimes just to get a reaction. She also throws things when she's unhappy - like yesterday I she didn't want to have a nap despite being tired and grumpy so she kept throwing her dummy and water bottle at her bedroom door.
With the hitting, we just stop her and say to her "no DD, hitting hurts mummy and it's not nice. Be gentle". But she seems to be pushing it more and more.
Anything that she throws gets taken away for a period of time.
Any other suggestions?