S1·E19 Lost

'When you lose something, don't worry, you have to focus and remember where you went so you can find it again'.

Bing takes his Hoppity Voosh toy to the park to see the ducks and play on the slide. But when he steps in dog poo and heads to Amma's house to get cleaned up he leaves Hoppity behind. Amma helps Bing to focus so that he can remember where he went and retrace his steps to find Hoppity.