GIVT is an internet project that allows direct support for nonprofit organisations. You buy and they, from your purchase, send a part of your money to your chosen organisation.
Choose your favourite sports club, cultural organisation, charity or interest group and choose an online store where you usually shop online. From each of your purchases, the pre-determined percentage will be sent to your favourite non-profit organisation!
Your selected organisation can be ESN Czech Republic. Install the plugin from GIVT website and donate.