S.H.
I can help with the computer usage only...haven't figured out the IPod/Ipad.
There is a computer program for only $30 called times up kids (timesupkids.com). It is the BEST invention ever. You can limit time of day, how long, when they have to take breaks, setting different things for different days and it is really easy to add or take away time. I LOVE it!! My kids HATE it (which means it works). The cost of $30 is for as many computers you have and is good forever. A bargain in my world. The computer gives warnings to the kids with time left and at times up, it logs them out. I cannot tell you how much this has made my life easier. I am no longer the bad guy and time police!