My seven year old loves the imaginative aspect of D&D and is always asking family members to play with him. No dice, no table needed, he'll just narrate a story and ask what you do.

Thoughts on how he could scratch this itch when no one is available to play with him? Computer game (text based??), board game that serves as the DM? I never got much exposure to MUDs of the 1990s but I'm dreaming of something like that