The four-year-olds take their first steps towards independence, and learn about friendship

The children are joined by new faces, including Taylor, who tries to befriend the girls

This episode meets 12 five-year-olds. Alfie and George can't agree what the sun's made of.

Sienna captures Arthur's heart. Alfie makes a breakthrough in a painting competition.

Topics from race to religion, love and death are up for discussion among the six-year-olds

Caitlyn and new girl Leila bond when they try to cover up a cake mishap