Argos are doing the 'early bird' 3 for 2 offer on toys again, ending on Tuesday 2nd October. Until Sunday 30th September they are still running the voucher promotion where you get a £5 voucher for spending over £50 or a £10 voucher for spending over £100.
The offer doesn't show in your online basket, but will show up when you go to collect your reservations, or at the till. Rumour has it that Kurio and innotab are included in the offer. I 'll be buying moshi monsters toys and hexbugs for christmas.
Unlike 3 for 2 offers in other stores the till doesn't arrange them in order of price, it simply gives you the cheapest ones for free, so it's sometimes worth doing each 3 in a separate transaction to get the best savings.