We like hotwheels here. 
I've never managed to get Aquabeads to work. Piddling little balls everywhere.
Wheelybug, got it for DS1's first birthday, I don't think it has ever been played with, not by DS1 or DS2 or any visiting children.
Marble runs make me clench my fists a little. The ones that don't click together (e.g. wooden blocks resting against each other) are not allowed past the door as they just topple at the slightest nudge.
Yes to everyone who said Lego kits, unless your child likes putting them together themselves. Takes an hour to build the bloody thing, it gets trodden underfoot or loses one critical wheel and is discarded into the lego box which ends up being one third actual blocks that can be assembled easily and two thirds random spiky bits that came off the kits.
I'm going to buy the plain boxes of blocks next time, I think it's better for their imagination anyway.
We bought the Cars the movie remote controlled cars last year and they broke in different ways within a week. And they weren't cheap.
Fireman Sam Play Station was such a rip off in so many ways.
Jigsaw books - as someone else said, pieces fall out.
I bought a wooden kitchen from GLTC and it fell apart within a year. It was 120 quid. The 30 quid plastic one at my parents is still going strong
Megablocks. Far less entertaining than they lead you to believe. Just go straight to Duplo.