The award-winning series that lifts the lid on the ups, downs, tears, tantrums and triumphs of the playground
The original documentary following ten four-year-olds as they meet at nursery
The Secret Life of 4 Year Olds
The four-year-olds take their first steps towards independence, and learn about friendship
4 Year Olds (2015): Episode 1
The children are joined by new faces, including Taylor, who tries to befriend the girls
4 Year Olds (2015): Episode 2
This episode meets 12 five-year-olds. Alfie and George can't agree what the sun's made of.
5 Year Olds (2015): Episode 1
Sienna captures Arthur's heart. Alfie makes a breakthrough in a painting competition.
5 Year Olds (2015): Episode 2
Topics from race to religion, love and death are up for discussion among the six-year-olds
6 Year Olds (2015): Episode 1
Caitlyn and new girl Leila bond when they try to cover up a cake mishap
6 Year Olds (2015): Episode 2
Children from the original programme and the series team up for their own Nativity play
The Secret Life of Children at Christmas
A group of four-year-olds meet for the first time and forge new friendships
4 Year Olds (2016): Episode 1
A temptation task gives new boy Kahana a chance to shine
4 Year Olds (2016): Episode 2
New five-year-olds arrive. Ellie-Mae takes Daisy, who has cerebral palsy, under her wing.
5 Year Olds (2016): Episode 1
Sensitive Nat vies for new girl Calla's attention. The class learn about competitiveness.
5 Year Olds (2016): Episode 2
This episode examines differences between boys' and girls' behaviour
5 Year Olds (Feb 2017): Episode 1
Can the boys and girls learn from each other's skills to solve a magic carpet puzzle?
5 Year Olds (Feb 2017): Episode 2
Noah is obsessed with dinosaurs and can accurately name dozens of the reptiles
4 Year Olds (Nov 2017): Episode 1
Harper, who already has several girlfriends, has his eye on confident new girl Ava
4 Year Olds (Nov 2017): Episode 2
Jack seems to be the archetypal lad, but is he using a persona to hide his sensitive side?
5 Year Olds (Nov 2017): Episode 1
Daisy struggles when new kids come to the nursery. Can she take a risk on new friendships?
5 Year Olds (Nov 2017): Episode 2
This all-girl special reveals how girls see themselves - and the role of women - in 2018
5 Year Olds (2018): All Girls
The children decide if it's ever okay to cheat, and try to reunite a divided group
5 Year Olds (May 2018): Episode 1
The children are given a chance to wield power. What sort of leaders do they choose to be?
5 Year Olds (May 2018): Episode 2
How do tablets, robots and gadgets affect how the children play and interact?
4 Year Olds (Jan 2019): Episode 1
Arthur and Iris decide to be boyfriend and girlfriend, but Frankie also likes Iris
4 Year Olds (Jan 2019): Episode 2
Syrian refugee Omar struggles to make friends. Reilly has a crush on Harlo, who's from LA.
5 Year Olds (Jan 2019): Episode 1
A seven-foot robot comes to the garden. Can the children work out how to switch it on?
5 Year Olds (Jan 2019): Episode 2