How Do You Stop Your Toddler From Resenting the Baby?

(4 min read)

Somewhere between announcing baby number two or three and the baby actually arriving, there's a question almost every mama asks us, how do you stop your toddler from resenting the baby. Underneath it sits a quieter fear too, that loving a second child might mean loving the first one a little less.

The Research Says Something Different

It's easy to picture the worst version of this, the withdrawn toddler, the meltdowns, a resentment that never quite fades. That's the story most of us have absorbed somewhere along the way. But the most comprehensive review of decades of research on firstborns adjusting to a new sibling found something far gentler. Some toddlers dip a little for a while. Some show no change at all. And in a finding that apparently surprised the researchers themselves, some toddlers actually get better at looking after themselves, at eating and sleeping, once there's a baby around to model for. What you're facing is a transition, and transitions respond beautifully to preparation, the same way you're already preparing for this baby.

Start Talking Before the Baby Arrives

Most of this groundwork happens in pregnancy, long before the birth. Your toddler picks up on changes in your energy, your body and your routine well before you've said a word about any of it, so naming things early actually reduces their anxiety rather than creating it. Keep it plain. Something like, I'm a bit more tired these days, there's a baby growing in here. Let every feeling sit in the room at once too, the excitement and the fear and even the odd flash of anger. Naming the thing nobody's saying out loud takes the edge off whatever's underneath it.

Give Your Toddler a Real Job

A little basket at your toddler's height, filled with wipes and a fresh nappy, turns nappy time into an invitation rather than an intrusion. Can you please grab the wipes for me, it's time for a nappy change. Letting your toddler take part in real, age-appropriate caregiving, holding the towel at bath time, passing the nappy, choosing an outfit, builds their sense of competence instead of displacement. It turns the baby from the thing that took your attention into their project too. Some toddlers even benefit from rehearsing the actual holding technique with a doll first, so the real thing feels familiar instead of terrifying. The job doesn't need to be big. It just needs to be theirs.

Play Is Doing More Work Than You'd Think

It's tempting to think of play as something to fill the time until the real developmental work happens elsewhere. I'd push back on that, gently, because play might be doing more of the heavy lifting here than anything else on this list. In one study, children doing structured pretend play showed a real, measurable improvement in managing big emotions, more than kids doing block building or story time. Interestingly, it didn't move the needle on empathy at all, and researchers think emotional regulation is the more foundational skill, the one that has to come first. That's exactly what your toddler needs most right now, the ability to feel something big without being completely run by it. In practice, this can look as simple as a baby doll before the birth, one your toddler feeds, wraps, settles, even tells off when it cries. Let them rehearse the hard bits too. It's them processing this whole transition through their own hands, at their own pace, well before it's real.

Build Yourself a Quiet Time Basket

You're going to need your own version of this too, some genuinely engrossing independent activity for the moments you're feeding or resting with the new baby. The trick is exclusivity, a rotating basket that only ever comes out during those windows, so it feels special rather than a consolation prize. Playdough, sticker books, a simple matching game, an audiobook with headphones, swapped out every so often so it never goes stale. The predictability matters just as much as the novelty, and over time it becomes its own comforting ritual, rather than a sign the baby has taken you away again.

Ask for Help in Two Directions

Preparation isn't only toddler-facing. Some of the most important prep is resourcing yourself, and that means asking for help in two quite different directions. The obvious one is someone taking your toddler out so you get undisturbed time with the baby. The one people forget is the reverse, someone taking the baby so you get uninterrupted, one-on-one time with your toddler. If asking for either kind of help feels uncomfortable, know that it isn't a modern parenting failure. It's actually the evolutionary default, the way humans raised children within a wide support network for most of our history, long before nuclear families made it something you were expected to do alone.

You're heading into a transition here, one that responds beautifully to the preparation you're already capable of giving it. Every early conversation, every small job you hand your toddler, and every hand you let in adds up to a softer landing for both of your children.

This blog was inspired by Episode 245 of The Science of Motherhood podcast. You can listen to the full episode here.

Disclaimer: The information presented by Fill Your Cup is not a substitute for independent professional advice. Nothing contained here is intended to be used as medical advice and it's not intended to be used to diagnose, treat, cure or prevent any disease, nor should it be used for therapeutic purposes or as a substitute for your own health professional's advice.