3 year old help!

Cassidy • 21 and mommy of 2! ❤

Guys... i have 2 girls. A 3yr old and a 1 1/2 yr old. For some reason, lately.. my 3 yr old doesnt want to listen, i try being nice and i try in a sturn voice. I also try putting her in time out but she just never seems to get it.. i know she understands when shes being bad and doing stuff she KNOWS shes not supposed to do. Can someone help me out please?

No rude comments please.