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Temperature matters too — chilling vegetables in the freezer for 20 minutes before serving them alongside room-temperature oil or warmed spices can create a new kind of sensory contrast.

“Every action you take, every experience you have is a combination of the remembered past and the sensory present,” Feldman Barrett told Salon in a phone interview.

The school has also introduced class breathing exercises, ear defenders and sensory gadgets which they believe help some children to concentrate.

She says she spent two hours talking with an assessor about the impact of Euan's disabilities, which include autism, obsessive compulsive disorder and sensory processing disorder.

Parents at a baby sensory group in Sale, Greater Manchester, told the BBC they were all against smacking children, but some were unsure about whether it was right for the government to intervene.