According to a post by Antenna TV, Joe Clokey (Art's son) died at the age of 56 yesterday. He took over the Gumby empire after his father died in 2010.

https://business.facebook.com/AntennaTV/posts/1876215599065464

However, The Hollywood Reporter is saying he died on March 2.

https://www.hollywoodreporter.com/news/joe-clokey-dead-son-gumby-creator-art-clokey-was-56-1107693

I had a Gumby and Pokey. Cute toys for a 6 year old