They will work good if you give them enough praise from the glove, candy, and fruit (The fruit is best, as it is a way to praise them and also gives them energy.). I buy the fruits and candy every time they show in the store so that I have it when it's needed. Even when my peeps are aged I'll buy it to have when training the next generation.
Anyway, to your question; After your peeps are well trained they need the tv and other forms of recreation to relax. I think it makes them live longer if they do more than just work all the time. If they're doing something and you want them to work just pick them up and place them back at their workstation. In a short time they'll go back to it on their own. I hope this answered your question Sweetie. Big hugs!!!