On the signup sheet, we asked each child to write their name and age. We set no upper or lower age limit on the workshop. We left thirty spaces for names to be written into, as that was our intended upper limit on attendance. The only condition we imposed upon attendance is that we asked that children attend all five days. Then we set the sign out in front of the community center.
By the end of the day, the signup sheet was nearly full. (Eventually, kids began writing their names in tiny letters, at the tops of boxes already claimed by other kids.)