I was just checking train times on First Great Westerns website when I came accross this.
"Free travel from Bristol Temple Meads and all stations to Avonmouth
Sunday 1st and Sunday 8th June." Obviously the 1st has passed us, but could be handy for anyone on this coming Sunday. There also doesn't appear to be a limit to how many adults or children can come with you. You could take the whole family on a ride for FREE!! The journey takes roughly 30 minutes each way, so it will kill an hour at least. Not sure what the stations in between are like, but some might be worth a look
Simply click on the link, fill in the details and print the voucher. Handy for anyone living in the area, or train spotters perhaps??