I require closed toed sandals or running shoes for both inside and outside or bare feet or robeeze in the house. I allow crocs but only if they stay on the child's feet. We run, kick balls etc. and they need to be safe when climbing up the slide. Anyone without proper footwear gets to go outside but is not allowed to do certain things and then mom is told in front of child of why child is upset they missed out - usually child comes next day properly attired and don't care if child wanted to wear whatever - parent could have made sure the proper item was available to me to fight with child for outside which of course wouldn't have been a problem because child knows what to expect here.