Being a granddad is just another reason to give it a go.
It's a great thing to jam with your grandkids. We have two that have shown interest in keyboards, ukulele, guitar and drums.
The eldest got into ukulele because of Jack's interest and then he took it up at school. Being the class clown, it is good that he has it as a productive outlet for his 'enthusiasm'. The newest arrivals, the twins, are a bit young yet but I am sure we have scope for a Proclaimers' tribute act down the line.