If you like Forbidden Island, Forbidden Desert is good to.
I also recommend Tsuro for kids. They seem to have a lot of fun following the paths and don't care if they lose. It also has a bit more randomness.
Colt Express is also a really good game that can be played with young kids. Just put the board together prior to your first game. Have it all ready to go. The putting together of the train cars can be a bit time consuming right out of the box.
Lastly Dungeon of Fortune is also a good fun game for kids.
I hadn't thought that Splendor could help teach some planing and math but that is great.
I second Colt express.