|Do you only want them to have access to the columns A and B only?? |
If so, try this.. Select the range of cells that you wan them to have access cells (EX: A2:B20). Right click on one of the selected cells and Select FORMAT CELLS. Then find the "Protection Tab" and UNCHECK the box next to" Locked". Close the FORMAT CELLS box. Then we are going to protect the worksheet and/or workbook depending on whichever you wish. This method will vary depending on which version of Excel you have. If it is the 03 version, go to Tools, Protect. If it is 07+, go to the Review Tab. Once you select Protect Sheet, you should see some options or "permissions" with check boxes next to them. Here we want to DESELECT "Select Locked Cells" so that they will only be able to select the cells that we previously "unlocked".
BEST OF LUCK!