The micro machines racing games or the ps1 era game Toy Story 2: Buzz Lightyear to the Rescue, might scratch some of the exploring houses as a little thing itch.

There is a TTRPG exactly matching what you're after. Small folk setting for fate core. http://www.warehouse23.com/products/the-small-folk

Which has a brilliant play through in this podcast https://tabletoptales.roleplayingpublicradio.com/tag/top-of-...