Reducing Tantrums for Babies and Toddlers

A mom wrote "This week my 10 month old has started throwing terrible tantrums when she doesn't get her way. I read its a normal part of development but its like I have a completely different child these days. How long does this phase usually last? I think she doesn't feel understood and throws a tantrum about it. Is there anything I can to do ease her frustration? Thanks in advance :)"
I responded back "It is normal for young children to throw tantrums. They don't gain enough emotional regulation to 'hold it together' until they are somewhere between 3 and 5-years-old. Even at that age it is still a developing skill so if they are tired, hungry or coming down with a cold, they may have a meltdown.
One idea is to teach her some sign language so she can communicate what she would like. The Baby Sign Language site has a bunch of free videos showing how to make various signs."
The mom replied "She doesn't sign yet but when I sign what she wants she has the biggest smile on her face since I 'understand' her. I will encourage her to start signing and hopefully that will relieve some of her frustration. Thank you so much!"