Some hardcore tracks at the time were extremely light and upbeat; the most extreme examples of this were the so-called "toy-town" tracks such as Smart E's' "Sesame's Treat" which features the children's show "Sesame Street" theme song. A style of hardcore with light and upbeat sounds and a predominant kick drum, with less emphasis on breakbeats, would many years later be known as happy hardcore. These were particularly prominent in the summer of 1992 when hardcore crossed over commercially in the UK and its charts.