Instead of trying to card the wool properly (ie with carders) teasing each fibre by pulling it out of the staple to separate it and then collecting them into a 'fluffy cloud' works well for smaller amounts of wool - I wouldn't suggest it for a jumper :-)

If you want a try at carding small amounts the dog groomers with hooky wire (bit like velcro) would work as proper carders are just large scale versions. I've even done it with dried teasel heads but they are a pain.