Create an Activity Jar
A simple, general jar for moments of 'I don't know what to do'.
Keep it Simple
Usually for parents managing kids, or just for yourself.
Low-Stakes Fun
Add easy activities: 'Draw a picture', 'Build Lego', 'Call Grandma', 'Clean your room' (maybe sneak that one in).
Instant Cure
When boredom strikes, spin. The rule is you HAVE to do it for at least 15 minutes.