Classic 32-Piece Magnetic Tiles
If you buy one toy for a six-year-old, make it this. By six a child has graduated from the flat mosaics they built at three or four to real structures — boxes, garages, marble-drop towers, whole little cities — and Magna-Tiles are the rare building toy that keeps up. The magnets are strong enough that ambitious builds actually hold, which is the difference between a delighted kid and a frustrated one. It's genuinely open-ended: no instructions, no wrong answer, and it pulls in siblings of every age. The real tiles cost more than the knock-offs and earn it — the cheap magnets give up after a few months.
Builds: spatial reasoning · geometry · planning
~$40· See it on Amazon