Martin has your Saturday Newsround. We have the latest from day one of the Olympics, we talk to Team GB gymnast Max Whitlock, and what would you put in a time capsule to reflect the last 18 months?

Everything you need to know about the Tokyo Olympics

Do the Olympics inspire you to be more active?

A giant balloon will send a new telescope to space!

Note: Due to sports rights we can't always show the full programme online. You can watch the full version, with optional subtitles, on BBC iPlayer here.