Sorry quite long as a bit of backgroung is needed.
My daughter turned 2 at the end of June 2011 and she is really intelligent (may be biased).
The main factors are:
Can count to 20 in English
Can count to 8 in Spanish, (we do not speak spanish and think she has picked this up from Dora),
She recognises if you ask her to count in Spanish or English.
Often counts backwards from 10 correctly, even whilst playing
Will remember statements, such as, 'We will build a den after dinner'. As soon as dinner is done we have to build a den.
Recognises colours such as pink, purple, brown, as well as primary ones and will get the correct crayon even if the wrapping is a different colour.
Recognises shapes and can draw them if asked.
Spots mumbers in the street and calls them out.
Has circled the toys in the Argos catalogue for Xmas.... we thought she was scribbling but she has a definate view on what she wants, (quite a tomboy and has missed out the entire girly range except for a kitchen).
As parents we thought she was rather bright, but thought our own biased views made this the case. This has now been picked up by her childminder and even people at the bus-stop who think she is older than she actually is.
I have been on the Mensa website and they have said that for children under 10, their tests be carried out by an educational psychologist.
They seem to mainly carry out tests on ADHD or troubled kids and partner now thinks that if I go ahead and organise this it may label her.
I think that if we get advice on encouraging and building her intelligence then this will benefit her in the future.
I should add that we do not sit her down and command her to draw shapes or count, but do this as part of family fun time ie: sat on one parents knee as we play Trivial Pursuit with her much older brothers, (she gets to move the counter).
Do I go ahead with the tests or not. I am afraid of becoming complacent with her intelligence and not allowing her to have the best opportunies in the future.