My summer intern project with Alison Hill was a bookdown book called rstudio4edu (coming soon!), and for this project we wanted to create custom, pretty tip boxes (aka custom blocks, sidebars, or –as I like to call them– “div tips”) to use in the book we were writing. We also wanted to include them in a series of site templates geared towards educators (also coming soon!), using R Markdown, bookdown, etc.