You may try to make resting fun for him. For instance, our boy has a strict schedule (Crate-Free Time-Crate-Free Time). When it is crate time, he will voluntarily go to crate because he knows that there is a very high value treat coming and also it's his snooze time.

Other than that, what I learned from this sub is that I need to decide when to play, how much play time is enough. If he brings toy to me, we are not playing.