You probably already know this but I wanted to share just in case. I have completely shopped for my kids and by shopping in reservations of three like priced items saved quite a lot of money.
Eg: a Furby £59.99, scalextric £44.00 (half price), Lego set £34.99 so got the Lego set free.
If you don't reserve and pay in batches of three with like priced items you will only get the cheaper items free so not saving as much iyswim?
Anyway I have saved a fortune and brought presents for every child I needed too so just thought I would share.