I have a almost 6 month old baby. She has just started eating solids sitting in high chair. DS 4 has now taken to nicking her dummies & sucking them all the time, never really had them as a baby as rejected them baby doesn't really use them either only occassionally. Wants to sit in high chair, bumboo for meals. He has also Started squarking and crying like a baby. Is this normal, he is driving me bonkers and I am just going along with it hoping he will get bored??? Any tips would be greatfully received.