I just found this site today and registered my boys. Select bowling alleys in all or most states are offering this deal where kids can bowl 2 games per day for the entire summer. You can also get a family pass for $24.95 that allows up to four additional people to bowl 2 games each day as well. The site is www.kidsbowlfree.com.
https://freebowling.amf.com/ Here is another one! I don't know how long AMF has been offering it but I just found out about it. We've done the Kids Bowl Free in the past and loved it. AMF has different criteria as far as age but it's closer for us so it might balance out in gas money saved.