I discovered this app while dropping in on a Canvas MOOC this summer. It’s perfect for online brainstorming of paper topics or crowdsourcing responses. Think wiki page blended with tag clouds. The 20 character limit forces the answers to be broad enough without becoming too academic. In setting one up, an email and password allow administrative access to remove individual off-topic or inappropriate responses. But in general, this is a great additive application, so the more amassed in the garden the better it will grow (ideas).