I had this last year and think about it the parents don't have time to take them outside. Also most of them were probably too small last year to do too much exploring and now your it! Put a big blanket out with a few of there favorite inside toys and books and trust me they will start to explore on there own especially when they see the bigger ones doing what it is they should be doing! LOL

Also put out a small dishpan with water and suds with a few little people they will go crazy!