Ok, here it is, I had it outside in the summer, but bought it in, in the winter, but then it started growing!
You can see on the pic below, the light green is were it has grown

But, why has it only started growing indoors? you would think it would do better outside in the sun right? unless its somekind of indoor cacti

The seeds. I sucessfuly germinated some seeds last year, it only took 7 days, they didnt grow much at all despite being in the sun. unfortunatly they met thier end when our table in the backgarden blew over and took the tiny seedlings with it. There were no bodies to salvage. Is there any reason they were not growing? was it the soil? any tips?
Thanks

not quite sure what it is...perhaps a Euphorbia?

may have started growing indoors because it was warm. It is in desperate need of sun otherwise it is just going to collapse. A sunny windowsill in a cool room if you have it, and don't water.

That's an Opuntia

But it was in the sun and didnt grow at all, and it was warm, so thats kind of against logic to put it back in the sun right?

Wrong

It's a cactus.

well, unfortunatly, that makes no difference, because it doesnt grow in the sun, it only grows indoors, so why put it in the sun?

It would have been growing.

You just didn't notice it.

I take it you fed and watered it.

Well, Ive never fed it, just a rare watering, thats all Iv ever done
If it grew out side, wouldnt it have gone a light green like in the picture?

No

Why?

Because it would have had sufficient light to grow properly.

Austrocylindropuntia subulata by the look of it... and as others have said, desperately in need of light.

mm, well ok Ill put it in the sun a bit more then. does anyone know the name of the cacti that has dragon fruits?

Dragon Fruit are mainly Hylocereus sp. but may also be from Stenocereus

austrocylindropuntia subulata...no doubt!!!
i use to grow these a few years ago
the light green growth looks very unhealty. i use to have problems like this right before dormancy. i keeped them outside in the summer and inside in the winter because of the cold wheater. if you keep the plant cool and water it rarely it will stop growing ....then in the spring when you take it outside and give it lots of water it will grow like crazy........all the growers i know , in cold climates, use this method to control ugly weak growth that can occur inside if insuficient light is a issue.
i colected cacti and succulents for about 3 years and in my experience these plants will do much better if you give them the winter rest!!!!!!!!!

Thanks mark.ca, Ill try that. :)