I've started by knitting these 2 children's hats:
Although they are quite different in appearance, they both use the same multicoloured yarn as their base. It's another King Cole bin end yarn, which is great value for £1 per ball. I love the different colours in the yarn, but as a fairly thin DK (or at least that's what I think it is - you have to guess with bin ends yarns) it needed boosting to make warm hats for children. Coned yarn to the rescue!
Two strands of 3 ply wool / acrylic mix in ivory went into the paler hat, while two strands of alpaca / acrylic 2 ply in a camel colour went into the darker one.
They both make interesting mixes that could be worn by either a boy or a girl. I am enjoying experimenting with mixing colours like this - I might try with some green next!