Toddler Acting Out Because of New Baby?

Toddlers and babies can coexist. They almost always have to. Many people choose to have children close enough together that they have two under two or two under three. And I will be the first one to jump up and say THIS IS SO HARD. I will not speak for everyone, but my two under three experience felt like I was playing full time as a defensive lineman while feeling completely guilty that my toddler did not get as much of me as they used to.

Toddlers also start to act out because of a new baby, and you may feel like it is because you do not give them as much attention as you used to. It is true, and it is how it has to be. If you are feeling like you just are not quite getting the rhythm of having two children and juggling everything that entails, well mama you are not alone. I have some ideas for you too.

I sincerely hope that the ideas that I share in this post can help you to feel more in control of things and recognize that you are doing a great job as a mom. If you are reading this post I can almost guarantee that you care enough to try, and that is an indicator that you are the exact person your kiddos need. So keep loving them, and keep learning how to care for them. We are in this together as moms, so here are some tried and true tips from my experience.

Why Toddlers Seem to Act Out When Baby Is Around

When you are in the thick of it, it can feel like your toddler is acting out because of a new baby every single day. You may see more crying, more clinginess, more tantrums, more resistance, and even behaviors that feel shocking like sitting on the baby, pushing the baby, or trying to climb into your lap the moment you sit down to feed the baby. These behaviors can feel overwhelming, but they are not signs that your toddler is bad or that you are doing something wrong. They are signs that your toddler is trying to understand a major life change.

Toddlers are still learning how to regulate emotions. They do not have the language skills to say I feel replaced or I miss you or I am confused about what is happening. Instead, their bodies express what their words cannot. When a toddler is acting out because of a new baby, it is often rooted in fear, confusion, and a deep desire for connection. They are not trying to hurt the baby. They are trying to figure out where they fit now that the family has shifted.

The fact of the matter is that sharing mommy is hard. Step into your toddler’s shoes for a moment and imagine that your favorite person in the world suddenly had to divide their attention. Imagine that every time you wanted to sit with them, someone else needed them first. Imagine that your routines changed, your environment changed, and your sense of security changed. Toddlers feel all of this intensely, and they do not yet have the tools to process it.

Research on early childhood development shows that toddlers thrive on predictability, connection, and one on one attention. When a new baby arrives, all three of those things shift. Routines change. Mom is physically occupied more often. The toddler’s world feels less predictable. So the toddler acts out because of a new baby not out of defiance, but out of a need for reassurance.

Crying more is a request for comfort. Clinginess is a request for closeness. Sitting on the baby is a request for proximity to you. Tantrums are a release of emotions that feel too big to hold. When you see these behaviors through the lens of need rather than misbehavior, it becomes easier to respond with patience and compassion.

What Toddlers Need Developmentally

Understanding what toddlers need developmentally can help you support them during this transition. Toddlers are not miniature adults. They are not even miniature older children. They are in a stage of rapid brain development, emotional growth, and identity formation. When a toddler is acting out because of a new baby, it is often because their developmental needs feel disrupted.

Time with Mom

Toddlers need connection with you. Even small pockets of focused time can make a big difference. Ten minutes of reading together, a few minutes of snuggling before nap, or a simple activity like stirring pancake batter can refill their emotional cup. The goal is not perfection. The goal is presence.

Time with Friends

Toddlers benefit from time with peers. Playdates, library story times, or toddler classes can give them a sense of independence and social connection. Being around other children helps them practice sharing, communication, and emotional regulation. It also gives them a break from the intensity of the new baby dynamic.

Independent Play

Independent play is a skill that develops over time. Toddlers need opportunities to explore toys, activities, and imagination without constant adult direction. This helps them build confidence and resilience. When a toddler is acting out because of a new baby, strengthening independent play can give them a sense of control and accomplishment.

Time Helping with Younger Sibling

Toddlers often want to be included. Giving them small, safe tasks can help them feel important. They can bring a diaper, choose a onesie, shake a rattle, or help pat the baby’s back. These moments help them feel connected rather than replaced.

Responsibility

Toddlers love responsibility when it is framed as a privilege. They can help set the table, put toys in a basket, or carry a washcloth to the bathroom. These tasks build confidence and reduce feelings of helplessness.

Remember to keep your expectations realistic. This one can be hard. When baby arrived, suddenly my two year old felt giant by comparison. The size difference somehow makes it feel like they should be more capable. But they are still very young. They still need support, guidance, and patience. Remember they are still a “baby” in a lot of ways too.

What Baby Needs to Bond with Sibling

Babies are born ready to bond. They recognize voices, respond to touch, and learn through repetition. To help your baby bond with their toddler sibling, create gentle, positive interactions. Let the toddler hold the baby with support. Encourage the toddler to talk to the baby. Narrate what the baby is doing. Celebrate every moment of connection.

Babies benefit from hearing their sibling’s voice, seeing their sibling’s face, and feeling their sibling’s gentle touch. These early interactions build the foundation for a lifelong relationship.

What Mom Needs to Have Patience with Toddler

Supporting a toddler who is acting out because of a new baby requires patience, and patience requires energy. You cannot pour from an empty cup. You need rhythms and routines that ground you.

Time to Make a Loose Plan

A loose plan helps you feel grounded. It does not need to be rigid. It can be as simple as knowing what meals you will make, what activities you will offer, and what pockets of rest you can build in. Planning reduces decision fatigue and helps you stay ahead of the day.

Consider Waking Up First

If possible, waking up before your children can give you a moment of quiet. Even five minutes can help you feel centered. This is not a rule. It is an option. If you are exhausted, sleep. But if you can manage it, a few minutes of stillness can change the tone of your day.

This was really hard for me while breastfeeding because I was waking up multiple times during the night to feed the baby. Adapt to what you need. A lot of the time, I wouldnt be up before my kids. I would be woken up by my todder just after laying down to catch a little more sleep after a final feeding around 6 am. So I started a routine WITH my toddler where they would read or color for just a few minutes while I sat nearby and read scripture and made a loose plan for the day. Even that short amount of time grounded me.

Quiet Time

Quiet time is essential for mom, toddler, and baby. Toddlers need time to reset. Babies need time to rest. You need time to breathe. Quiet time can be reading, puzzles, blocks, or simply resting in a cozy space. It teaches children that rest is part of the rhythm of the day. We taught our toddler that they had to stay in their room, but that if napping wasnt working they were welcome to play quietly or read. 98% of the time, they would play for 30 minutes or so and then climb into bed. This will look different for everyone. Find what works for you, but try hard to have INDEPENDENT quiet time each day.

Be Grounded in Something

Whether it is Bible reading, self awareness, meditation, running, or journaling, grounding yourself in something helps you stay steady. When you feel centered, it becomes easier to respond with patience rather than frustration.

Ideas for Toddlers Found in the Real Life Rhythms Toolkit

The Real Life Rhythms Toolkit is designed to help moms create simple, sustainable routines that support both toddler and baby. It includes activity ideas, bonding prompts, independent play setups, and gentle structure for your day. These tools help toddlers feel secure and engaged, which reduces acting out and increases connection.

Real Life Rhythms Toolkit

Some of the ideas include toddler friendly invitations to play, simple sensory activities, sibling bonding prompts, and quiet time routines. These ideas are practical, easy to set up, and designed to work in real life with real children.

Final Thoughts

If your toddler is acting out because of a new baby, you are not alone. This season is challenging, but it is also full of opportunities for growth, connection, and joy. Your toddler is learning. Your baby is bonding. You are doing the best you can with the energy you have. That is enough.

You are the exact mom your children need. You are building a family, one moment at a time. And you are doing a beautiful job.