Make it readable — keep it to 2 pages, avoid heavy blocks of text, and don't tell every detail. (louisekursmark.com)
They might be tempted to stand on a chair to stack the blocks even higher or could be injured if heavier blocks fall onto them. (verywellfamily.com)
Heavy blocks of text, and by that I mean text that is greater than three lines in length, are easy to read in print but tough to read online. (ivyexec.com)