This will be a short informative post about how you can enhance your scratch buffer using ielm aka Inferior Emacs Lisp Mode, an interactive REPL for Emacs Lisp. It is much more powerful than Emacs Lisp Interaction Mode.
Just add this bit of code to your config:
(require 'ielm)
(setq initial-major-mode 'inferior-emacs-lisp-mode)