CBBC ·

Hey You What If?

Tuesday 20 October 2026, 09:20 – 09:25 UK time

You Built the Tallest Building on Earth. We reveal how to create the ultimate in tall buildings by going to the moon and taking inspiration from wedding cakes.

Upcoming showings

Other scheduled episodes, repeats and reruns across all channels. All times are UK time.

CBBC

Hey You What If?

Wednesday 21 October 2026, 09:20 – 09:25

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CBBC

Hey You What If?

Thursday 22 October 2026, 09:20 – 09:25

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CBBC

Hey You What If?

Friday 23 October 2026, 09:20 – 09:25

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