At Mary Katrantzou and Simone Rocha, a Look Back at Childhood

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Models on the Mary Katrantzou spring 2018 runway.

Staying young at heart during London Fashion Week.

On Sunday morning, Mary Katrantzou presented an explosion of bold colors — "Crayola crayon-box bright," according to show notes — for spring.

Childhood memories (not hers, personally, but instead "an idealized infancy") served as the jumping point for the Athens-born, London-based designer's escapist collection, which was playful and extravagant.

The idea of rainy afternoons spent crafting (how good does that sound?) translated into looks incorporating oversized florals, interlocking perspex blocks inspired by Legos, and hand-braided details meant to reflect the good old days of handmade friendship bracelets. Bubble dresses and skirts in voluminous shapes were made of nylon, drawing on images of children's balloons, kites and camping trip tents.

Jelly shoes were elevated with kitten heels and sky-high platforms, and decorated with studded details, while bright handbags featured plastic chain links as handles and inflatable dolphins and flamingos.

Meanwhile, on Tuesday, Irish-British designer Simone Rocha referenced her own youth with a spring collection inspired by the vintage dolls she had growing up.

Models were dressed in Victorian-influenced silhouettes designed with a combination of lace, satin, ruffles and white frills. Standouts included a white eyelet layered dress and a tulle dress adorned with sparkly flower embroideries.

The footwear was just as fun, from the pearl-embellished flatforms to the furry slides.

Here's to staying forever young (at heart).