We had a game at the office that requires you to move a marker through a maze using a magnet underneath the maze board.
Some of the items that I included didn't work out as well. I made my own cryptogram about King Tut on a website, but failed to notice that there weren't many letters that repeated, so it was very laborious for the kids. I had pages on complete and incomplete Pascal's Triangles (I enjoy dorky math type things) for kids to do simple addition and color in the even and odd numbers with different colors (try it, it makes a pattern!). However, even the older kids I worked with struggled mightily with the simple addition concepts and did not know odds/evens, so this did not go anywhere. The complex folding and taping required for the pyramid construction was also pretty hard for most. However, judging by what I read on other blogs and the IEPs I saw from other districts, I think that my kids on caseload (who were being mainstreamed) were generally lower functioning than others getting OT, so these items may work for you with your kids in a graded manner.
Overall, I enjoyed making this bag and trying to instill a little love for learning about ancient Egyptian culture with my kids, though it didn't necessarily work out as planned.