If you have a pair of trainers that are not that hot anymore, I think a great way to spice them up and make them more fun is to add pink shoe laces to them. Just look what a big difference this makes:
Pink shoe laces are not even very expensive and you can find them almost anywhere. I have tried this trick myself, and it lifts your mood and makes the shoe so much cooler. So I strongly urge all lovers of pink to try this!