This Seeking Tech guide will explain how you can easily ride on the flying sleigh in the Winter Wonder level of Astro Bot.
Use the following video as a reference:
For the first step, head to the right at the start of the stage to get the octopus power-up.
Afterwards, use the power-up to jump on top of the octopus balloons nearby.
You then need to wait until the sleigh gets close enough.
When it does, you should be able to jump and hover over to the presents.
This can also be done during the night after you unlocked all 15 collectibles.