My wife borrowed a little brush I use to raise carpet pile...............it's about 300 cms wide, with long, but flexible bristles, about 100cms long, cost about £3 - £4.
The result of her brushing our daughters carpet was amazing, far better result than vacuuming.
I find it's quicker and easier to take in this little brush for aggitation on many occasions, the brush complete with pole cost less than a fiver and weighs next to nothing.
rob