If you thought that the hand-knit cat sweater that your grandparents got you for your 18th birthday was pretty cool, check out what grandma and grandpa Nelson did for their grandson Josh on his big day. What could be cooler than an original birthday blues song performed by your old hep-cat relatives?

It may not be your typical birthday gift but it will certainly be a memorable one for years to come. And judging from grandma's dance moves, you can tell the musical duo had a great time making this video. Josh must feel pretty lucky to have such groovy grandparents.

[Via: Reddit]