It's Harper's birthday, and the crew of the Big SISS have invented him an amazing present: a machine that can change the orbit speeds of planets in the Solar System! But will increasing Earth's orbit speed bring Christmas a week closer, or wipe it off the calendar completely?

The one stop shop for all kinds of Festive fun and stories from the multi-award winning RTÉ Kids podcast stable in Ireland. Suitable for kids aged 4-10.

<p>The one stop shop for all kinds of Festive fun and stories from the multi-award winning RTÉ Kids podcast stable in Ireland. Suitable for kids aged 4-10.</p><p></p>

The one stop shop for all kinds of Festive fun and stories from the multi-award winning RTÉjr Radio podcast team in Ireland. Suitable for kids aged 4-8. And Santa too.