Quick answer: most preschoolers find a new sibling harder than their parents expect, and some regression or jealousy is completely normal. Prepare them with honest, concrete information before the birth, keep their routines as steady as you can, and give them a small amount of reliable one-to-one time afterwards. The rough patch usually settles within a few months.

For months your child has patted your tummy, chosen a soft toy for the baby and told everyone at school they are going to be a big brother. Then the baby comes home, and it turns out the baby is staying.

This is the moment many parents discover that enthusiasm in theory and enthusiasm in practice are different things. The sweet, capable four-year-old starts wetting the bed, asking for a bottle and pinching the baby when nobody is looking.

None of this means you have made a mistake. It means your child has noticed, correctly, that something enormous has changed.

Why it hits so hard

From a preschooler's point of view, a new baby is a stranger who arrived with very little warning, takes up most of your time, gets carried everywhere and is admired for doing nothing at all.

Young children cannot yet say "I am worried there is less of you for me now." So they show it instead. Clinginess, bigger tantrums, defiance, sudden shyness and a new interest in being a baby themselves are all ways of asking the same question: am I still important?

The answer, delivered repeatedly and in actions rather than speeches, is what settles it.

Regression is a request, not a reversal

Regression means going backwards on skills a child had already mastered: toileting, sleeping alone, feeding themselves, talking in full sentences. It is very common after a sibling arrives and it is almost always temporary.

The most effective response is also the least satisfying one: stay calm and low-key. If your three-year-old wants a turn in the baby's rocker or asks to be fed like the baby, you can play along briefly and warmly. "You want to be my baby for a minute. Come here." Children who are allowed a little babyhood usually lose interest quickly, because being big has better perks.

Toileting accidents are best handled without comment. Clean up, change clothes, move on. Shame tends to lengthen this phase, not shorten it.

Before the birth

  • Be concrete. Tell them what newborns are actually like: they cry, they sleep a lot, and they will not be able to play for a long time. Realism prevents disappointment.
  • Read books about new siblings. They give your child words for feelings they have not had yet.
  • Move other changes away from the due date. If your child is moving to a big bed, starting toilet training or starting preschool, do it a few months before the birth or wait until well after. Tying those changes to the baby makes them feel like an eviction.
  • Plan the hospital days. Tell them who will look after them while you are away, and practise a sleepover with that person if it is new.

After the baby arrives

Mind the first meeting. If you can, have the baby in a cot rather than in your arms when your older child walks in, so your arms are free for them.

Give ten minutes a day that belong to them. Short, predictable, one parent, no phone and ideally no baby. Give it a name, such as special time. Reliability matters far more than length.

Give them a real job. Fetching the nappy, choosing the baby's socks, singing to the baby in the car. Helping makes them part of the team rather than the audience.

Name the hard feelings. "It is annoying when the baby needs me and you wanted me." Accepting the feeling does not mean accepting the pinch, and your child can hear both.

Keep the rough stuff firm and calm. If they hurt the baby, step in at once, move the baby, and say plainly, "I will not let you hurt her." Once things are calm, find some attention for the older child. Hurting is often the fastest way they have found to make you look.

Protect the routine. Same bedtime, same breakfast, same drop-off, wherever possible. Predictability is reassurance they do not have to ask for.

What we notice at school

Teachers often see the arrival of a sibling before anyone mentions it: a child who needs a longer goodbye, who wants to sit closer at story time, or who plays mummy and baby with unusual intensity in the home corner.

That play is useful. Children work through big changes by acting them out, and a doll that gets fed, scolded and cuddled is doing a lot of emotional heavy lifting. Our teachers give it room, keep the rhythm of the day steady, and let parents know what they are seeing so that home and school respond in the same way. It helps a great deal if you tell us when the baby is due.

When to seek advice

Most adjustment settles within a few months. Talk to your doctor if regression is severe or goes on for a long time, if your child seems persistently withdrawn or unhappy, if aggression towards the baby continues despite close supervision, or if sleep and eating change significantly.

The long view

Siblings who squabbled furiously at three and five very often become each other's closest allies later. The jealousy is not a sign the relationship will be difficult. It is simply how it starts.

Your older child does not need you to divide your love with perfect precision. They need regular proof that there is still plenty to go round.

Shaws Preschool has helped children through new siblings, house moves and every kind of big change across the East Coast and Serangoon since 1989. Come and see how our teachers keep the days steady: book a tour.