I am trying with my kids who are 13 months apart and the youngest is almost 19 months. (thenaturalmommy.com)
I wouldn't try it with a kid who really didn't want to use the potty, though, or a kid who chafed at a lot of structure or was having any stress or changes going on in his or her life. (askmoxie.org)
Here are some MoneySmart ideas for cheap or free activities you could try with your kids during the school holidays. (moneysmart.gov.au)