Hi there, my dd is 20 months and I'm looking for advice of appropriate discipline for this age group. She's beginning to show defiance at times eg/ I say no and she does it anyway with a big grin on her face. Also when playing with other children she's not got the concept of sharing yet, is this normal? It's hard because she obvs doesn't have the language skills for me to explain why she shouldn't do something yet. Tips appreciated x