Sure ... but be well aware that using the I-phone t otether to your computer to provide internet service can quickly become expensive. So just use your web browser / email / news services. Don't get carried away downloading anything ... or you will use all of your data allocation quickly.
If you tether the I-phone to a MacBook the process is very easy ... just connect the cable ... and away you go. Remember to untether (disconnect) when your finished.
Do not let the kids use it.