How Can Having a New Sibling Affect a Child’s Development?

If you’re expecting another baby—congratulations! While the birth of a new sibling is an exciting and joyous occasion, it can also spark big questions, especially if you already have a young child. Understandably, many parents wonder: How can having a new sibling affect my child’s development? Will they feel jealous or left out? And perhaps most importantly, how do I navigate the transition smoothly?

At Little Angels Nursery, we understand the emotional complexities of introducing a new sibling to your child. That’s why we’ve created this helpful guide, packed with tips on how to introduce a new sibling, navigate new sibling jealousy, and support a positive new sibling transition—while also highlighting how nursery life can help ease the process.

How Can Having a New Sibling Affect Development?

While many parents anticipate challenges, the arrival of a new sibling can offer remarkable developmental benefits for older children:

Improved social understanding – Children learn to interpret another’s thoughts and emotions.
Learning to share – Taking turns and cooperating become part of everyday play.
Leadership and responsibility – Older siblings often enjoy ‘helping out’ and modelling good behaviour.

Still, feelings of new sibling jealousy can arise—especially if your child isn’t emotionally prepared. That’s why setting expectations early is key.

How to Introduce a New Sibling Positively

The way you handle the introduction of a new sibling sets the tone for their relationship. Try these tips:

Stay calm and positive—your child will feed off your emotions.
Avoid reprimands—model gentle behaviour instead.
Let the first meeting happen with the baby in a cot to reduce jealousy.
Involve your child before birth—encourage chats with the bump.

Managing New Sibling Jealousy

To minimise tension and help your older child adjust:

Prepare changes (like room moves) well in advance.
Involve your child in preparing for the baby—let them choose clothes or toys.
Spend dedicated one-on-one time with your older child post-birth.
Celebrate their new role with praise and small responsibilities.

The Role of Nursery in Easing the Transition

Nursery can be a huge support during this period. At Little Angels Nursery, we help children:

Settle into safe routines.
Express feelings through creative activities.
Receive attention and encouragement from staff.
Socialise with peers and build confidence.

If your child isn’t in nursery yet, this could be an ideal time to start. Book a nursery tour to explore our nurturing environment.

Support Development Through the Transition

Use books to explore emotions (like I’m a Big Sister).
Encourage independent play.
Acknowledge and validate their feelings.
Keep routines consistent.

Explore Our Nursery in Southwark

If you’re looking for a nursery in London, Little Angels offers the support your growing family needs. Join a nursery open day or get in contact with us today.

We’re here to make the transition smoother—for your child, your family, and your newest arrival!