One fun game to play on Papble is the Papble Word chain, here is how the rules work.
You are given a start word; you then morph that word into a new word. The rules to change the words are simple:
1. Add a letter - ex. you can turn PAN into PAIN
2. Remove a letter - ex. you can turn FROG into FOG
3. Change a letter - ex. you can turn PIG into PUG
4. Create an anagram (rearrange letters) - ex. you can turn RATES into STARE
Note: Rules are independent as you cannot remove a letter and rearrange that the same time.
Every word must be a valid word in the Webster’s English dictionary http://www.merriam-webster.com/.
Start with CAT, get to DOG
COT - Change A to an O
DOT - Change C to an D
DOG - Change T to an G