Solar energy outreach activities for schoolchildren: Hands-on experiments on photovoltaics, solar thermal and solar water disinfection - Vivar M; Fuentes M; Pichel N; Lopez-Vargas A (2018 Ieee 7th World Conference On Photovoltaic Energy Conversion, Wcpec 2018 - A Joint Conference Of 45th Ieee Pvsc, 28th Pvsec And 34th Eu Pvsec, 2018)