I loved Jonny Quest when I was a kid, and I think my 10-year-old (and I) will love Rocket Robinson, a graphic novel by Sean O'Neill, which reminds me of the 1960s cartoon. Get a taste of it by reading the webcomic, and then chip in to Kickstarter if you dig it.
Rocket Robinson and the Pharaoh’s Fortune (or RRPF for short) is a classic adventure story set in Egypt in the 1930s, and follows the exploits of 12-year-old adventurer Rocket Robinson as he tries to unravel the mystery of a hidden, ancient treasure, located somewhere in the city of Cairo. For the last three years, the story has been available online as a webcomic, but unlike many other webcomics, this story was always envisioned as a book. It is a single, stand-alone story, and—although many comic fans around the world have been enjoying reading one page a week—it’s meant to be read cover-to-cover as a book.