Here are two Granny Squares I've done so far for my Baby Afgan.
The yarn is Patons Fairytale Dreamtime 4ply, 100% new wool. Colours I've used are: Primrose (2931), Turquoise (2935), Lime (2936), Hot Pink (2939). The needle is a 3.5mm.
I found a lovely pattern called 'Summer Garden Granny Square' by Lucy at 'Attic 24', and may have a go at this one next, as it's like pretty flowers blooming in a gorgeously colourful garden! Please go and take a look at her lovely Blog - it's so bright and full of colours!