Prescription for Ennui:

Rx: books!
To be taken at least 2x daily.

Rx: adventure!
To be taken in massive doses, served with love and joy.

If you have a backyard which is private property and therefore accessible to you during confinement, going outside is a great way to engage the senses. Kids can listen, touch, smell... then even draw, journal.

If you have an attic, basement, or garage with boxes of stuff from prior decades or even prior generations, these can be fun to explore... and often result in sharing precious family stories.

If you have digital photos, it can be meaningful to re-discover these and arrange favorites into a thematic book or two, to be printed locally.

If you can impress upon the kids that they are living though times which will be recorded as important history for future generations, they may appreciate thinking about the controversy involved in balancing pros-and-cons such as our Rights to freedom of assembly -vs- various forms of lockdown, quarantine, social distancing, shelter-in-place.

If your kids are at least 13-1/2 (but have not reached their 24th birthday), they may be interested to set, document, and achieve goals... and earn a Congressional Award. This may be a great time to begin. Setting and achieving goals can provide a great sense of purpose, for adventures undertaken.