Stratego,
Axis and Allies
Any healthy GAME is allowed in Islam.
Like football or other physical games.
Or mental games like arranging Islamic quiz for children with a humble prize will be very interesting for them.
You can make Islamic Jeopardy at home. You as the parent will be the ‘Alec Trebec’ asking the kids questions. You can maybe play it once a week and after your done with the game you can take them out to the park or for some ice cream, whatever they like as a small treat. During the week before the big game they can study Islam more because if they don’t do good answering Jeopardy questions, they won’t get the treat!
these games are very good
the hadith challenge and the quraan challenge you can see more details on them here
Here is a good one i play on!!
I must say Alhamdulillah you are doing a fine job with the kids. For both the categories that you have mentioned, I would advice you to pay a visit to the following link:
It is from a site of the World Renowned Islamic Researcher Dr. Zakir Naik. It contains everything related to Islam. Though some stuff requires to be purchased through the net that wont be much difficult.
Waalaikumussalam.