DS2 was 6 at the beginning of May. His fave present was Mandala magnetic art
It seems expensive for what it is, (and you do have to faff about affixing the magnets at the beginning which takes AGES), BUT it's a fantastic product. It's very well made and sturdy, and the kids love it. Dss both find it very relaxing and calming. And ds2 has played with it every night since his birthday .. about 6 weeks!
Unfortunately I don't think it's available from Bright Minds any more. But if you Google there are other stockists.
He also likes Blokus and Tantrix