Unfortunately I don't think you'll find any of those 'trendy' colourful themed bags/lunchboxes, etc for much less money than what you've mentioned. They are usually good quality though and last for a long time.
The quality of the mooo backpacks is outstanding! I got one for DS2 for preschool this year and there is hardly a mark on it! they are really durable and well made. But like Ausgirl said, all of that stuff is usually around that price mark. Also check out Bobble Art and Penny Scallan's stuff as well.
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