Hi!! I don't understand this at all...maybe their parents never take them outside???? I try to spend as much time as possible outside with my dck!!! I also find that the less 'toys' we have the more fun they seem to have! They all love really basic things like hide and seek, running, rolling down the hill and hunting for bugs!! They are 2, 22 months and 3. It makes me sad that some kids don't know how to play outside but I don't really have any advice on how to teach that! Maybe try playing something like tag or trying a little scavenger hunt where you look for special leaves, grass, bugs etc. We get really dirty here.....maybe your little guys don't like getting muddy?