skateboarding, inviting skateboarders to come in off of the city streets and into organized skateboarding activity areas. By 2006 there were over 2,400 skateparks worldwide and the design of skateparks themselves had made a transition, as skaters turned designers. Many new places to skateboard designed specifically for street skaters, such as the Buszy in Milton Keynes, UK, and the Safe Spot Skate Spot program, first initiated by professional skateboarder Rob Dyrdek throughout many cities, allowed for the creation of smaller alternative safe skate plazas to be built at a lower cost. One of the largest locations ever built to skateboard in the world, SMP Skatepark in China, at 12,000 square meters in size, was built complete with a 5,000-seat stadium. In 2009 Skatelab opened the Skateboarding Hall of Fame & Skateboard Museum. Nominees are chosen by the IASC. 2010spresent Efforts have been taken to improve recognition of the cultural heritage as well as the positive effects of encouraging skateboarding within designated spaces. In 2015, the John F. Kennedy Center for the Performing Arts in Washington, D.C., hosted an event at which skateboarders accompanied by music did tricks on a ramp constructed for a festival of American culture. The event was the climax of a ten-day project that transformed a federal institution formerly off-limits to the skateboarding community into a platform for that community to show its relevance through shared cultural action in a cultural common space. By raising £790,000, the Long Live Southbank initiative managed in 2017 to curb the destruction of a forty years old spot in London due to urban planning, a salvaging operation whose effect extends beyond skateboarding. The presence of a designated skating area within this public space keeps the space under nearly constant watch and drives homeless people away, increasing the feeling of safety in and near the space. The activity attracts artists such as photographers and film makers, as well as a significant number of tourists, which in turn drives economic activity in the neighborhood. Recently, barefoot skating has been experiencing a revival. Many skaters ride barefoot, particularly in summer and in warmer countries, such as South Africa, Australia, Spain and South America. The plastic penny board is intended to be ridden barefoot, as is the surfboard-inspired hamboard. Electric skateboards became popular during the 2010s, as did self-balancing unicycles in a board format. The sport of skateboarding made its Olympics debut at the 2020