Photos of museum Experimentarium

https://www.flickr.com/photos/yijia/32156583097/in/photolist-qzwoLw-6Yruh-6Yrqg-6Yrsr-6YrrU-6YrrC-oyZfnu-8VkW3-8VkWd-NLDjWb-PbbNpy-QZyTQv