Any suggestions for objects/activities to occupy the fidgety hands of a man with advanced dementia?

My husband loves coloring as well . We did however have to buy very simple children’s coloring books ( of dogs as he loves those) as the adult ones became too difficult. My granddaughter also suggested painting small rocks which he really enjoyed and we all painted some and made a tiny rock garden in front of our house . I call it our Zen garden but it’s kind of a gardenette 😂 I just bought some brick pavers and painting them is our next project to “fancy “ up our patio . He does fidget constantly while sitting and watching TV or listening to iTunes . He sometimes rubs his knuckles raw so it’s really a constant battle . I bought some items from an online Alzheimers source and sometimes they work and sometimes not . What works best is petting the dog but sometimes he gets too intense and poor thing gives him a dirty look and jumps down from the sofa . In the early evening we sit outside in front of our house and he holds the dog on his lap and visits with our neighbors as they pass by . In that way he can’t fidget and is social at the same time . Yesterday his hands were very restless and I was going to make twice baked potatoes so I had him wash 10 pounds of potatoes which made him feel useful , kept his hands busy and also tired him out a bit . All these things work now but who knows what tomorrow will bring . I’m finding it’s trial and error and whether he is having a day where he’s receptive to my suggestions . Good luck everyone . Pat yourselves on the back and say
“good job” cause we need to hear that even if it’s from ourselves .

Thank you everyone!