This app by Menter Iaith Môn allows you to have a call from Sion Corn on your iPhone so he can leave a special Welsh message for your little ones.
It’s also a great way to show your children that even people in the North Pole can speak Welsh too!
You can download the app for 99p here.
And if you’d like to see what Siôn Corn is up to on Twitter you can visit his profile here.
How about encouraging your child to write to Santa in Welsh this year?