I just found this on a recipe blog Jacque guided me to, and I haven't tried these, but I thought they were a fun variation and kids might love them.
20 6 inch flour tortillas
1 lb ground beef
16 oz shredded cheese
Preheat the oven to 350. Trim about 1/2 inch from edge of tortillas, push into muffin tins.
Brown ground beef, add seasoning and about 2/3 cup of water, simmer until water is absorbed. Put about 2 Tablespoons of meat into each muffin tin. Cover with cheese. Bake for about 10 minutes or until cheese is melted and tortillas are brown.
Serve with shredded lettuce, tomatoes, salsa, sour cream, avocados, etc.