Ask HN: Training in London – where, what and when

Our company organizes training for students of technical schools (exactly for those who recently completed school), in connection with our partner company - based in UK - we are planning to conduct them in the United Kingdom - which places / organizations would you recommend as a possible place to visit in London and the surrounding area to show young people IT business and technology? Perhaps one of you wants to show people your business? Give them a possibility to see something new?