Just moved ds to first bed (why didn't I do it sooner? He now wakes up and plays happily for ages before demanding my presence) - problem is I can't find bottom sheets (flat or fitted) to fit. The mattress is 30" by 60" - so bigger than a cot bed but much smaller than a single. Single bed sheets just swamp it. Ideally want bright colours as his room looks like an explosion in a paint factory. Anyone got any ideas? John Lewis are no good, Mothercare, M&S, Habitat, D&J have also proved useless.