31 weeks old baby is more capable to learn his/her surroundings and identifying his/her parents or guardians. The baby may start socially engaging with you. His/her curiosity level has increased, and he/she is engaging with toys (especially phone type) and trying to new foods and testes. During this time, you can start new foods. But one thing, It's more important to be aware that the selection of new foods is little bit complicated. It may cause infant diarrhea or constipation.
During this week you can develop new skills and even seeing new skills your child is presenting day by day.
You may notice that her jabbering has increased. The baby is discovering more about the things around him/her and they wants to tell you what about they see. The baby will try to ask you about them.