smbc-comics has done a whole slew of C+H inspired strips with two kids out having a deep but strage philosophical conversation. It's very difficult to actually find anything you're looking for in the SMBC archives though... E.g. https://www.smbc-comics.com/comic/qualia

Zach Weinersmith’s Beawolf graphic novel is basically an ode to Calvin. He has a new book coming out soon, too.

Looks like it's "Bea Wolf" (I had not heard of it and Googled.)

Mobile view -

https://m.xkcd.com/409/