When my son Caden was born my daughter Leighton was 22 months old. My husband and I were worried about how she might adjust to having a baby in the house. The first couple days she did great. Then she realized Caden was getting more attention. Leighton began to act out. She would shake Caden’s bassinet or touch his face. When she did this we gave her a time out. After a few time outs, Leighton would purposively shake the bassinet and then run to timeout. Clearly this wasn’t working! I then created a sticker chart. Anytime she she stayed away from Caden, ignored him or was sweet to him I rewarded her. If Leighton was playing with a toy by herself I would say “Wow Leighton nice job being nice to your brother” and gave her a sticker. Within a day this resolved the problem. If you need help creating a chart or working with your kids to accept the new baby feel free to contact me!