Where in central London can I find a stocking filler/Hawkins type shop near a huge bookshop?

[anorak]

Thinking of doing a bit of Christmas shopping later today, need pressies for boys aged between 6 and 11, can spend about £5 each upwards.

I'll arrive at Euston and have to meet friends later at Waterloo.

TIA

There's a huge Waterstone's on Oxford St, not far from Oxford Circus tube (straight down Victoria Line from Euston) and Muji has some very sweet stocking filler-y things (branches in Carnaby St and Tottenham Court Rd)
HTH

thank you

If you do go to Muji, anorak, check out the balloon-powered boats (3.50, I think). Boy heaven